How an automatic watch gets its energy
An automatic watch is a mechanical watch with one additional component: the rotor. This oscillating weight turns with every arm movement and transmits the rotation through a gear train to the mainspring in the barrel. The tensioned spring drives the balance wheel via the escapement, and the balance sets the beat. If it is unwound, the watch stops: not a defect, but the normal state without energy.
The question almost every beginner asks: can you overwind an automatic? With an intact movement, the answer is no. At the outer end of the mainspring sits a slipping clutch, the slipping bridle, which slips against the barrel wall as soon as the spring is full. Surplus winding energy is dissipated there as friction; our watch knowledge section explains the technical terms.
Automatic, hand-wound and quartz: where the line runs
The catalogue comprises 303 models, of which 181 are automatic, 84 quartz, 24 solar-powered and 14 purely hand-wound. Quartz runs for years without intervention, solar charges in the light, and mechanical needs movement or your hand. Automatic and hand-wound store their energy in the same mainspring: a watch like the Hamilton Khaki Field Mechanical simply has no rotor, see the best hand-wound watches. The basic decision is settled by the comparison Automatic vs. quartz, and the choice of model by the best automatic watches, the watch finder and the watch catalogue.
Winding an automatic watch: the first start after purchase
The core rule is this: a stopped automatic needs an initial charge first, before wearing alone is enough. The rotor contributes only a tiny amount per arm movement, so a freshly unpacked watch initially runs with too little power and often inaccurately. The cleanest way is to wind by hand via the crown, provided the movement supports it.
Many modern automatic movements offer this function, but by no means all, and you cannot tell from the model name: whether yours has it is stated in the manufacturer's instruction manual. If it does, turn the crown slowly clockwise in the pushed-in home position until the seconds hand starts moving, then add a few more turns. If hand-winding is missing, calm swirling in the hand helps; wild shaking only strains the rotor bearing. Either way: wind first, then set.
Understanding the crown positions
Almost every automatic watch with a date works with three crown positions. Winding takes place in the pushed-in home position, the date is quick-set in the first click, and in the second click the hands move to set the time. On watches without a date the middle step is omitted, and on GMT models the first click may be assigned to the 24-hour hand. The assignment differs from calibre to calibre, so a glance at the manual is quicker than trial and error.
Unscrew screw-down crowns first
Sports-oriented watches often have a screw-down crown, which is drawn against its gasket by a thread. It can only be pulled out once you have unscrewed it anticlockwise, and it must be screwed back in afterwards, otherwise even a 300-metre watch is effectively unprotected, as the guide to water resistance in watches shows. This construction is widespread among sports-oriented watches of all kinds: the catalogue lists it explicitly for the sports watches Nomos Glashütte Ahoi and Longines Conquest 41 as well as for the dive watch Alpina Seastrong Diver Extreme. With 57 of 181 automatic models, dive watches are in any case the largest group in the catalogue; more on them in the best dive watches and best sports watches.
Setting the time without mistakes
To set the time, pull the crown out to the last click and move the hands forwards where possible, that is clockwise: this corresponds to the running direction of the gear train. Short corrections backwards are uncritical on most movements, but larger jumps are better run forwards. Some movements also stop the seconds hand as soon as the crown is pulled out, allowing you to set it to the second against a time signal; whether your calibre has this seconds stop is stated in the manual.
The 12-hour trap on date watches
The most common mistake has nothing to do with technology: a 12-hour dial does not show whether it is morning or afternoon. If you set it wrongly, the date changes at midday instead of at midnight. So first turn the hands slowly past 12 and watch whether the date advances: if it jumps, it was midnight and you are in the morning; if it does not jump, turn forward another twelve hours. Watches without a date, such as many classic dress watches, do not have this problem.
Setting the date and the dangerous no-go window
The most important rule of this guide is: never set the date during the no-go window. This means the period from late evening into the early morning hours, in which the date mechanism is already engaged and preparing the jump. Quick-setting then strains fine teeth that are not designed for it, and in the worst case damage remains.
The safe routine is simple: before every date correction, set the hands to around 6 o'clock, where the switching lies outside the critical range. Then set the date to the previous day via the first click, turn the time forward past midnight until the date jumps, and continue to the current time. That way the date and the half of the day automatically match.
The 30th and 31st of the month
A simple date mechanism counts stubbornly up to 31 and knows nothing of February or April. After every shorter month you correct by hand, so five times a year. Only an annual or perpetual calendar takes this off your hands.
Second time zone on GMT models
An additional 24-hour hand brings another setting level into play. In the catalogue, 15 automatic models have this function, from the Seiko 5 Sports Field GMT SSK023 at a list price of €460, via the Baltic Aquascaphe GMT at €1,100, to the Tudor Black Bay GMT at €4,600; the Nomos Glashütte Zürich Weltzeit instead works with a city ring. How it is set depends on the construction of the calibre and is stated in the manual; the differences are explained in the guide to the best GMT watches.
Power reserve in practice: from 38 to 120 hours
The power reserve tells you how long the watch keeps running after you take it off, and it has the biggest everyday effect. Of the 181 automatic models in the catalogue, 168 state a value and 13 give no figure; the range runs from 38 to 120 hours, with a median of 42. The catalogue splits into two camps: 88 models stay at 42 hours or less, while 52 reach 70 hours or more.
The most common single value is 38 hours, at 36 models, and in exactly half of these there is a Sellita SW200-1 or a movement variant based on it inside the case. Under its own designation, this movement powers 18 automatic models in the catalogue, including the Sinn 556 I at a list price of €1,200. The everyday threshold, however, is around 60 hours: if you take the watch off on Friday evening and put it on again on Monday, you bridge roughly this time, and exactly 64 automatic models manage that. All the others are stopped on Monday morning.
| Power reserve | What that means in everyday life | Example from the catalogue | Guide price |
|---|---|---|---|
| 38 h | One day's break is fine, the weekend is not | Steinhart Ocean 39 | approx. €450 |
| 41 h | Safe overnight, tight from Saturday | Seiko 5 Sports SRPD55 | approx. €330 |
| 42 h | Catalogue median, weekend not covered | Baltic Aquascaphe GMT | approx. €1,100 |
| 60 h | Weekend just bridged | Baltic HMS 003 | approx. €360 |
| 70 h | Safe from Friday evening to Monday morning | Seiko Prospex Alpinist 38mm | approx. €700 |
| 72 h | Three full days, one day's buffer | Longines Spirit 40 | approx. €2,300 |
| 80 h | Long weekend without resetting | Tissot PRX Powermatic 80 | approx. €750 |
| 90 h | Almost four days, cheapest automatic | Swatch Sistem51 | approx. €150 |
| 120 h | Five days, the catalogue's top value | IWC Pilot's Watch Mark XX | approx. €5,700 |
A long power reserve is not a question of price. At 80 hours sit the eleven Powermatic 80 models, such as the Tissot Le Locle Powermatic 80 and the Certina DS Action Diver at €700 each, plus the five watches with the Hamilton H-10 such as the Khaki Field Auto 38 at €750 and the Khaki Field Murph 38 at €1,000. Context on these: the best Tissot watches, Certina watches, Hamilton watches and Seiko watches. For the 13 models with no figure, including the Stowa Flieger Klassik 40, we deliberately assign no number; you can set two candidates against each other in the direct comparison.
How much wearing is enough to keep the watch running
The rotor charges not by hours on the wrist but by movement. If you spend the day at a desk, you hardly move your forearm in the plane that turns the rotor, and so some watches are not fully charged in the evening despite being worn daily. Two solutions help: more wearing time, or occasional winding by hand, provided the movement offers hand-winding. This also benefits timekeeping accuracy, because a mechanical watch runs most evenly in the upper third of its spring tension. If you notice a clear deviation, check the charge first.
Watch winders: when they make sense and when they don't
Honest answer first: for a single watch that you wear almost every day, you don't need a watch winder. It keeps the watch charged, but it solves a problem that doesn't really occur in daily life: winding and setting take less than two minutes. It becomes worthwhile in two cases: for watches with elaborate calendar functions, and for a collection that you wear in rotation. Models and settings for rotation direction and turns per day are shown on our sister site TopUhrenbewegerReviews. A winder changes nothing about the rules above: the crown still has to be screwed down.
Common mistakes when winding and setting
Most damage is not caused by wear, but by a few handling habits that keep repeating. These five points cover the majority and can all be avoided without any tools. If you know them, you can go for years without an unnecessary visit to the watchmaker.
- Setting the date during the no-change window: The classic and most expensive mistake. Always turn the hands to about 6 o'clock first.
- Not screwing the crown back down: An open screw-down crown cancels out any water resistance, no matter how high the metre rating is.
- Setting the time backwards past midnight: Large backward jumps through the date change put unnecessary stress on the movement.
- Leaving the watch next to strong magnets: Speakers and magnetic clasps can magnetise a mechanical watch and make it run noticeably fast.
- Shaking instead of winding: Vigorous shaking does not charge it faster, but it strains the rotor bearing.
A sixth point concerns appearance: if you slip while setting, you tend to leave a mark on the crystal or bezel. How sensitive your crystal is, is covered in the comparison Sapphire crystal vs. mineral glass; if the watch fits your wrist poorly, the watch size guide helps.
Conclusion: winding and setting an automatic watch in five steps
The routine is short: first, wind it, either by hand winding via the crown or by gently swinging it. Second, unscrew a screw-down crown. Third, set the hands to about 6 o'clock and set the date to the previous day. Fourth, turn the time forward past midnight until the date jumps, and continue to the current time. Fifth, push the crown in and screw it back down. If you stick to this order, you avoid the no-change window, the 12-hour trap and water damage in one go.
Everything else is a question of power reserve: at 38 to 42 hours, setting the watch becomes part of Monday morning; from 70 or 80 hours it usually isn't needed. You can find suitable models by budget under Watches under €500 and Watches under €1,000, and by target group under Men's watches and Women's watches. Entry-level classics such as the Orient Bambino Version 2 for €180 are featured in the best Orient watches, and further basics are collected in the guide overview.