Watch Movements
The movement (or calibre) is the engine of a watch -- the mechanism that actually keeps time. There are two great families: mechanical, powered by a wound spring, and quartz, powered by a battery and a vibrating crystal -- with a host of clever variations in between, from self-winding automatics to light-powered solar and satellite-synced quartz. This hub explains every movement type you will meet on a spec sheet: how it works, how accurate it is, and which we stock. Where a term has its own in-depth page -- Swiss Quartz, Eco-Drive, Powermatic 80 -- we link straight to it.
Movements at a glance
| Movement | Typical accuracy | Power source | Upkeep | Best for |
|---|---|---|---|---|
| Quartz | ±15 sec / month | Battery (1-3 yrs) | Very low | Everyday accuracy |
| Automatic | -15 / +15 sec / day | Self-winding (wrist) | Service ~5 yrs | Enthusiasts |
| Hand-wound | -15 / +15 sec / day | Daily hand-wind | Service ~5 yrs | Traditionalists |
| Solar / Eco-Drive | ±15 sec / month | Light (no battery) | Very low | Fit-and-forget |
| High-accuracy quartz | ±5-10 sec / year | Battery | Very low | Accuracy seekers |
| Radio / GPS | Atomic-synced | Light + signal | Very low | Never set it again |
Mechanical movements
How a mechanical watch keeps time
Mainspring→Gear train→Escapement→Balance wheel→Hands
Mechanical
A watch powered entirely by a wound mainspring and a train of gears -- no battery, no electronics. The oldest and most collectable way to tell the time.
What it is
A mechanical movement runs on stored mechanical energy. You wind a flat coiled spring -- the mainspring -- inside a barrel; as it slowly unwinds it drives a train of toothed wheels, and an escapement releases that energy in tiny, equal steps to move the hands. Every part is metal, jewelled bearings and oil; there is nothing electronic inside.
How it works
Mainspring barrel feeds the gear train, which feeds the escapement, which is governed by the balance wheel. The balance swings back and forth at a fixed beat, and each swing lets one tooth of the escape wheel through -- that is what produces the ticking and the sweeping seconds hand. Typical beat rates are 21,600 or 28,800 vibrations per hour (3 Hz or 4 Hz).
How it performs
A good modern mechanical keeps time to roughly -15 to +15 seconds a day; chronometer-certified (COSC) examples are held to -4/+6 s/day. How long it runs off a full wind -- the power reserve -- is usually 38 to 80 hours. It is sensitive to magnetism, shock and temperature, which is exactly why the engineering inside it is so prized.
In our range
Our mechanical watches are led by Tissot, whose Powermatic 80 is the modern Swiss workhorse calibre. Browse Tissot watches, or read the dedicated Powermatic 80 guide.
Automatic (self-winding)
A mechanical watch that winds itself from the motion of your wrist using a weighted rotor -- no daily hand-winding needed if you wear it.
What it is
An automatic, or self-winding, movement is a mechanical movement with one addition: a semicircular weight called a rotor that spins on a pivot as your wrist moves. That motion is geared back into the mainspring barrel, topping up the spring all day as you wear the watch.
How it works
The rotor swings freely with gravity; a reversing mechanism turns its back-and-forth motion into one-way winding of the mainspring. Wear it daily and it stays wound; leave it off and it stops once the power reserve runs down. You can still hand-wind most automatics through the crown to start them.
How it performs
The same accuracy class as any mechanical (-15/+15 s/day typically, -4/+6 for COSC). The number that matters in daily life is power reserve: standard automatics hold roughly 38 to 50 hours, but modern long-runners like Tissot's Powermatic 80 hold 80 hours -- leave it off over a weekend and it is still ticking on Monday.
In our range
Our automatics are led by Tissot's Powermatic 80 -- an 80-hour Swiss self-winding calibre with a Nivachron anti-magnetic hairspring. See the wider Tissot range or the in-depth Powermatic 80 guide.
Who makes it: Powermatic 80 (our 80-hour automatic) -- Tissot
Hand-Wound (manual)
A mechanical watch with no rotor -- you wind it by hand each day through the crown. Thinner and purer, but it stops if you forget.
What it is
A hand-wound (manual) movement is the original mechanical layout -- mainspring, gear train, escapement and balance -- but with no self-winding rotor. All the energy comes from you turning the crown.
How it works
Turning the crown winds the mainspring directly. With no rotor and no automatic winding bridge, the movement can be made thinner and shows beautifully through a display caseback. You feel the spring tension build and stop winding when it firms up.
How it performs
Accuracy is the same mechanical class as automatics. Power reserve depends on the calibre -- many run 40 to 48 hours -- so a once-a-day wind at the same time each morning keeps it running and accurate. Forget, and it simply stops and needs resetting and the time put right.
Inside a mechanical movement
Escapement
The heart of every mechanical watch -- the gate that releases the mainspring's energy one precise step at a time, creating the tick.
What it is
The escapement is the regulating gate between the gear train and the balance wheel. In almost every modern watch it is a Swiss lever escapement: an escape wheel working with a pallet fork tipped with two ruby pallet stones.
What it does
The balance wheel swings; on each swing the pallet fork lets exactly one tooth of the escape wheel escape, then locks the next. That controlled release divides the mainspring's power into equal beats, keeps the balance swinging, and produces the ticking sound. It is the single most important component for timekeeping.
Why it matters
Escapement quality and lubrication decide how accurately, and for how long between services, a movement runs. The ruby pallet stones cut friction at the one point in the watch that never stops moving.
Balance Wheel
The timekeeper -- a weighted wheel on a fine hairspring that swings to and fro at a fixed rate, the mechanical equivalent of a pendulum.
What it is
The balance wheel is a finely poised metal wheel attached to a coiled hairspring (balance spring). Together they form a harmonic oscillator -- the part that actually measures out time.
What it does
The hairspring winds and unwinds, swinging the balance wheel back and forth at a constant frequency -- typically 3 Hz (21,600 vph) or 4 Hz (28,800 vph). Each swing gates one escapement beat, so the balance's frequency literally sets the rate of the watch. A regulator arm lengthens or shortens the active hairspring to fine-tune speed.
Why it matters
A faster beat (4 Hz) is generally more stable against knocks and gives a smoother seconds sweep. Modern hairsprings such as Tissot's Nivachron are engineered to shrug off magnetism and temperature -- the balance's two biggest enemies.
Rotor
The swinging weight that makes an automatic watch self-winding -- it harvests the energy of your wrist movement.
What it is
The rotor is a semicircular metal weight -- often tungsten or gold for density -- mounted on a pivot on the back of an automatic movement.
What it does
As your wrist moves, gravity keeps the rotor swinging, and a winding mechanism converts that motion into one-way winding of the mainspring. It is the only mechanical difference between an automatic and a hand-wound watch.
Why it matters
A well-balanced rotor on smooth bearings winds efficiently from everyday movement, which is what lets you wear an automatic for years without ever touching the crown. You can usually watch it spin through a display caseback.
Jewel Bearings
Tiny synthetic-ruby bearings set at the highest-friction pivots -- they cut wear and friction so the movement runs accurately for decades.
What it is
The jewels in a watch are small synthetic sapphire or ruby bearings -- the red dots you see on a movement. A typical automatic has 21 to 25 jewels; a simple hand-wound has 17.
What it does
They form hard, smooth, low-friction bearing surfaces for the steel pivots of the fastest-turning wheels and for the escapement's pallet stones. Synthetic ruby is extremely hard and holds oil well, so it barely wears.
Why it matters
A jewel count on a dial ("21 jewels") tells you the movement uses jewelled bearings at its critical points -- a marker of a properly built mechanical calibre, though not a measure of value in itself.
Quartz and light-powered
How a quartz watch keeps time
Battery / light cell→Integrated circuit→Quartz crystal (32,768 Hz)→Stepper motor→Hands
Quartz / Swiss Quartz
The accuracy king -- a battery drives a quartz crystal vibrating 32,768 times a second to keep time to seconds a month. The movement in most watches sold today.
What it is
A quartz movement keeps time electronically. A small battery powers an integrated circuit and a quartz crystal cut into a tuning-fork shape. "Swiss quartz" simply means the calibre -- often an ETA or Ronda movement -- is made in Switzerland.
How it works
Apply current and the quartz crystal vibrates at a precise 32,768 Hz (two to the power fifteen). The circuit counts those vibrations, divides them down to exactly one pulse per second, and a stepper motor advances the seconds hand one tick at a time -- the trademark once-a-second tick.
How it performs
Standard quartz is accurate to about plus or minus 15 seconds a month -- far better than any mechanical watch -- and needs only a battery change every one to three years. Swiss high-grade quartz (ETA Precidrive) reaches plus or minus 10 seconds a year.
In our range
Most of our fashion watches -- BOSS, Tommy Hilfiger, Olivia Burton, Vivienne Westwood and Swarovski -- use Swiss or Japanese quartz for accuracy and easy ownership. Read the full Swiss Quartz guide, or browse BOSS, Tommy Hilfiger, Olivia Burton and Vivienne Westwood watches.
Solar (light-powered)
A quartz watch that charges from light -- a solar cell under the dial powers a rechargeable cell, so it never needs a battery change.
What it is
A solar movement is a quartz movement with a photovoltaic cell behind the dial and a rechargeable secondary cell in place of a disposable battery.
How it works
The cell turns any light -- sunlight or ordinary indoor lighting -- into electricity that charges the cell and runs the quartz movement. A full charge typically lasts 6 to 12 months in total darkness, and a power-save mode stops the hands to conserve charge in storage.
How it performs
Quartz accuracy (about plus or minus 15 s/month) with the convenience of never replacing a battery. The headline solar technology we stock is Citizen's Eco-Drive.
In our range
Citizen Eco-Drive is the solar technology in our cabinets -- see Citizen Eco-Drive and the dedicated Eco-Drive guide.
Eco-Drive
Citizen's light-powered technology -- any light, natural or artificial, keeps it running for good. No battery, ever.
What it is
Eco-Drive is Citizen's name for its light-powered quartz system. A solar cell sits beneath the dial -- often hidden under a coloured face -- and charges a long-life titanium lithium-ion cell.
How it works
It charges from any light source. A full charge runs the watch for at least six months in the dark; power-save versions hold a charge far longer, and the Eco-Drive 365 line targets a full year on one charge. The rechargeable cell is built to last the life of the watch, so there is no battery to replace.
How it performs
Standard Eco-Drive holds quartz accuracy (about plus or minus 15 s/month); higher Citizen lines add radio or satellite syncing and thermocompensated accuracy. Many Eco-Drive models are cased in Citizen's Super Titanium -- Duratect-hardened, around five times harder and 40% lighter than steel.
In our range
Browse our Citizen Eco-Drive watches, the wider Citizen range, and read the full Eco-Drive guide.
Who makes it: Eco-Drive -- Citizen
Kinetic
A quartz movement charged by wrist motion -- a rotor generates electricity instead of winding a spring. A Seiko technology, shown here for reference.
What it is
Kinetic is a hybrid: the self-winding rotor of an automatic married to a quartz movement. It is a Seiko technology, included here for completeness rather than because we stock it.
How it works
Wrist motion spins a rotor that drives a tiny generator, charging a capacitor or cell that powers a standard quartz circuit. You get quartz accuracy without a disposable battery, charged by movement rather than light.
How it performs
Quartz accuracy (about plus or minus 15 s/month); a full charge can store weeks to months of running time. Not currently part of our range -- our motion-free, battery-free watches are Citizen Eco-Drive (light-powered) instead.
Who makes it: Kinetic -- Seiko (not stocked)
Spring Drive
Seiko's hybrid that winds like an automatic but is regulated electronically to a glide-smooth, near-perfect seconds hand. A reference entry -- not stocked.
What it is
Spring Drive is a Seiko and Grand Seiko movement that uses a real mainspring for power but replaces the mechanical escapement with an electronic brake regulated by a quartz reference. Included as an educational reference; we do not stock it.
How it works
The mainspring drives the gear train as normal, but instead of a ticking escapement a Tri-synchro regulator uses a quartz crystal and an electromagnetic brake to control a glide wheel's speed exactly. The result is a seconds hand that sweeps with no ticking at all.
How it performs
Around plus or minus 1 second a day -- far better than a normal mechanical -- with a true glide-motion seconds hand. For context only; our mechanical range is Tissot, using the Swiss lever escapement.
Who makes it: Spring Drive -- Grand Seiko (not stocked)
High-accuracy and connected
High-Accuracy Quartz (HAQ)
Thermocompensated quartz accurate to a few seconds a year -- the most accurate movement you can buy without radio or satellite syncing.
What it is
High-Accuracy Quartz (HAQ) is a premium quartz movement that measures and corrects for temperature, the main thing that throws ordinary quartz off.
How it works
A normal quartz crystal drifts slightly as temperature changes. HAQ movements add a thermometer and circuitry that adjust the timekeeping to compensate, holding the rate steady across hot and cold.
How it performs
Roughly plus or minus 5 to 10 seconds a year -- around ten times better than standard quartz. Citizen's The Citizen and Chronomaster lines reach plus or minus 5 s/year.
In our range
Citizen is the HAQ name we carry -- explore the Citizen range.
Who makes it: The Citizen / Chronomaster HAQ -- Citizen
Radio-Controlled (atomic)
A quartz watch that resets itself to an atomic clock by radio signal -- effectively never wrong, never needs setting.
What it is
A radio-controlled (atomic) watch is a quartz movement with a receiver that picks up a time signal broadcast from a national atomic clock.
How it works
Once or more a day it receives a long-wave signal -- MSF from Anthorn in the UK (60 kHz), DCF77 in Germany (77.5 kHz), WWVB in the USA or JJY in Japan -- and corrects its own time and date to match the atomic reference. In covered regions it changes for daylight saving automatically.
How it performs
Accurate to a fraction of a second whenever it syncs; between syncs it runs as ordinary (or high-accuracy) quartz. Citizen pairs this with Eco-Drive so it is light-powered too.
In our range
Citizen offers radio-controlled Eco-Drive models -- see the Citizen range.
Who makes it: Radio-controlled Eco-Drive -- Citizen
GPS / Satellite
A solar watch that syncs to satellites for the exact time and your time zone anywhere on Earth -- no radio tower needed.
What it is
A GPS-synced watch uses positioning-satellite signals, rather than a ground radio station, to get atomic-clock time and work out which time zone you are in.
How it works
The watch receives timing data from GPS satellites, sets itself to the precise reference time, and adjusts to local time based on your position. Citizen's version is Satellite Wave and is typically Eco-Drive light-powered, so it needs no battery. It works worldwide, including where no radio time signal reaches.
How it performs
Atomic-grade time anywhere with a clear view of the sky, plus automatic time-zone changes for travel.
In our range
Citizen's Satellite Wave and Promaster lines carry this -- browse the wider Citizen range.
Who makes it: Satellite Wave -- Citizen
Origin and standards
Swiss Made
A protected label -- a watch can only say Swiss Made if at least 60% of its manufacturing cost and key steps are Swiss. Shorthand for the world's benchmark watchmaking.
What it means
Swiss Made is a legally controlled mark of origin. Since 2017 the rules require at least 60% of the total manufacturing cost to be incurred in Switzerland, with the movement Swiss, and the watch cased up and inspected in Switzerland.
Why it matters
It is a guarantee of provenance and, by reputation, of finishing and quality control -- the home of brands and movement makers like ETA, the Swatch Group calibre supplier behind much of the industry.
In our range
Tissot is our Swiss watchmaker -- over 170 years of Swiss Made history and home of the 80-hour Powermatic 80. See Tissot watches and the Powermatic 80 guide.
Japanese
The other great watchmaking nation -- Japanese movements are famed for reliable, accessible engineering and inventions like quartz and Eco-Drive.
What it means
A Japanese movement means the calibre is made by one of Japan's houses -- Miyota (Citizen's movement arm), Seiko, or Citizen itself. Japan gave the world the first quartz wristwatch in 1969 and light-powered Eco-Drive.
Why it matters
Japanese movements are prized for dependable, well-priced engineering: workhorse automatics like the Miyota 8215 (21,600 vph) and 9015 (28,800 vph), and some of the most advanced quartz and solar technology made.
In our range
Citizen is our Japanese house -- the inventor of Eco-Drive and Satellite Wave. Browse Citizen, Citizen Eco-Drive and Citizen Promaster.
Frequently asked questions
What is the most accurate watch movement?
For everyday watches, high-accuracy quartz (HAQ) is the most accurate you can buy without syncing, at about plus or minus 5 to 10 seconds a year. Radio-controlled and GPS watches are effectively more accurate still because they reset themselves to an atomic clock. Standard quartz (plus or minus 15 seconds a month) easily beats any mechanical watch.
Do automatic watches stop?
Yes. An automatic only winds while you wear it. Take it off and it keeps running on its stored power reserve -- usually 38 to 50 hours, or up to 80 hours on a Tissot Powermatic 80 -- then stops and needs winding and resetting.
Does a quartz watch need servicing?
Far less than a mechanical one. A quartz watch mainly needs a battery every one to three years (or never, if it is solar). A full service is only occasionally needed, mostly for seals and water resistance.
How long does a watch battery last?
A typical quartz watch battery lasts one to three years. Solar watches such as Citizen Eco-Drive have no replaceable battery at all -- they charge from light and are built to run for the life of the watch.
What is a calibre?
Calibre (or caliber) is simply the watch industry's word for a specific movement model -- for example, the Tissot Powermatic 80 calibre. It identifies the engine inside the watch.
What is Powermatic 80?
Powermatic 80 is Tissot's Swiss automatic movement with an 80-hour power reserve and a Nivachron anti-magnetic hairspring. See our Powermatic 80 guide.
What is Eco-Drive?
Eco-Drive is Citizen's light-powered technology. A solar cell under the dial charges a long-life cell, so the watch runs from any light and never needs a battery change. See our Eco-Drive guide.
What does Swiss Made actually mean?
Swiss Made is a legally protected label: at least 60% of the watch's manufacturing cost must be Swiss, the movement must be Swiss, and the watch must be cased and inspected in Switzerland.
Is a Japanese or Swiss movement better?
Neither is simply better. Swiss movements (like Tissot) are the benchmark for traditional mechanical watchmaking and finishing; Japanese movements (like Citizen and Miyota) are prized for dependable engineering and innovations such as quartz and Eco-Drive. Both are excellent.
Can magnets damage a watch?
Magnetism does not damage a watch but can make a mechanical one run fast or stop, because it affects the hairspring. Modern anti-magnetic hairsprings such as Tissot's Nivachron strongly resist this. Quartz watches are largely unaffected.
Automatic vs quartz -- which should I buy?
Choose quartz for best accuracy, lowest upkeep and lowest cost. Choose automatic if you enjoy traditional watchmaking, wear it most days and never want to change a battery. Accuracy favours quartz; craft and longevity favour mechanical.
Quartz vs solar -- what is the difference?
Both are quartz movements with the same accuracy. The difference is the power source: standard quartz uses a disposable battery; solar (Eco-Drive) charges from light and needs no battery changes.
Which watch movement lasts longest?
A well-serviced mechanical or automatic watch can run for generations, which is why they are handed down. Solar watches like Eco-Drive are the longest-lasting in low-maintenance terms, with no battery to replace for the life of the watch.
What is the power reserve?
Power reserve is how long a mechanical watch keeps running after it is fully wound and then taken off. Standard automatics hold 38 to 50 hours; a Tissot Powermatic 80 holds 80 hours.
What are the jewels in a watch?
Jewels are tiny synthetic ruby or sapphire bearings set at the highest-friction points of a mechanical movement. A typical automatic has 21 to 25 jewels. They cut wear so the watch runs accurately for decades.
What is an escapement?
The escapement is the gate inside a mechanical watch that releases the mainspring's energy one precise step at a time. It creates the ticking and is the single most important part for timekeeping.
What is a rotor?
The rotor is the swinging weight on the back of an automatic watch. As your wrist moves it winds the mainspring -- it is the only mechanical difference between an automatic and a hand-wound watch.
Why does my automatic watch lose time when I don't wear it?
If you don't wear it enough, the rotor cannot keep the mainspring wound, so the watch winds down and stops. A watch winder or a quick hand-wind keeps it running.
What is high-accuracy quartz (HAQ)?
HAQ is premium quartz that corrects for temperature, the main thing that throws ordinary quartz off. It reaches about plus or minus 5 to 10 seconds a year -- roughly ten times better than standard quartz.
What is a radio-controlled watch?
A radio-controlled (atomic) watch resets itself to a national atomic-clock signal, so it is effectively never wrong and never needs setting. Citizen pairs this with light-powered Eco-Drive.
Do solar watches stop in the dark?
Not for a long time. A fully charged Eco-Drive runs at least six months in total darkness, and power-save versions far longer, before it pauses to conserve charge.
Is Super Titanium worth it?
Citizen's Super Titanium is Duratect-hardened titanium -- about five times harder and 40% lighter than stainless steel, and hypoallergenic. It resists scratches and is very comfortable, so it is well worth it for everyday wear.
What movement do most watches use?
Most watches sold today use quartz, because it is accurate, reliable and affordable. Mechanical and automatic movements remain popular at the enthusiast and luxury end.
Which movement is best for a first good watch?
A solar or quartz watch is the easiest first good watch -- accurate and low-maintenance. If you want a mechanical watch to grow with, a Tissot Powermatic 80 automatic is an excellent first step into Swiss watchmaking.