What Citizen actually publishes about its automatics
This is the part that decides how you set the winder, so it is worth laying out plainly. Every figure here is from Citizen’s own documents.
- Caliber 8210 (the Tsuyosa, 40mm and 37mm alike): automatic winding, 21,600 oscillations an hour, a quick-set date, and Citizen lists a 42-hour power reserve and a hack feature for the reference. No accuracy figure.
- Caliber 8200: the same 21,600 an hour, and the one in the pair that carries a day-of-week wheel. Citizen’s manual for both calibers recommends winding the crown by hand five to ten times to start the watch, and states no daily accuracy figure.
- Caliber 8204 (the NY0-series Promaster divers): an average daily difference of −20 to +40 seconds, about 42 hours fully wound, 21,600 beats an hour, manual winding and a second-hand stop. Citizen adds the caveat that this is static accuracy at normal temperature and that it varies with how far the mainspring is wound, with position and with environment.
Two things follow. First, a Citizen automatic has roughly a day and a half of reserve — so it stops on the second day off your wrist, not the fifth, which is what makes a winder worth considering in the first place. Second, that last caveat about mainspring wind is the strongest argument for a winder that anyone in the industry has published: Citizen is telling you in its own manual that the watch keeps its stated time best when it is kept wound.
How to set a winder for a Citizen, with no Citizen figure to go on
Since there is no published Citizen TPD, work it out empirically — which takes about a week and is the only honest method.
- Wind the crown by hand first. Citizen’s own manual says five to ten turns to start the watch; our hand-winding guide covers doing that without stressing the movement.
- Set the winder to its lowest program — 650 TPD on a Versa or Rothwell. More turns is not better; the only thing extra rotation buys is running hours.
- Set the watch to a reference time, leave it on the winder for a week without wearing it, and check it. If it has stopped or lost badly, step up one setting. If it holds inside Citizen’s published band, you are done.
- Pick bi-directional if your winder offers it. Citizen publishes no direction preference, so alternating covers both possibilities without you having to guess which way its rotor winds.
Our TPD settings guide has the same procedure with the figures other makers do publish, and how to use a watch winder covers the two steps people reverse.
The 44mm problem
Citizen’s most serious automatic diver, the Promaster “Fugu”, is a 44mm case on a steel bracelet, and that combination is where cheap winder cuffs struggle — either the pillow will not expand enough, or it expands so far that it stretches the bracelet while it turns. Almost no winder maker publishes a case-size rating at all. WOLF does: it states a patented lock-in cuff rated for cases up to 52mm on the Heritage single, which is why that winder is on this page despite costing several times what the others do. If your Citizen is a 40mm Tsuyosa or a 41mm Promaster, this is not your problem and you can ignore it.
What to do about the Eco-Drives
Most Citizen collections are mixed, and that shapes the right purchase more than any winding setting. If you own one or two automatics and several Eco-Drives, the honest format is a winder with storage: powered positions for the mechanical watches, static slots for the light-powered ones — which is exactly the shape of the Liliaafar pick above. An Eco-Drive in a drawer will run down over months, but Citizen states a fully powered watch runs up to six months in darkness (up to seven years on select Power Save models), and a few hours in daylight brings it back. It needs light, not rotation. Our winders with storage page is the full list, and how to store watches covers the resting half of a collection.
Should you buy one at all?
For a Tsuyosa you wear four days a week, no — it keeps itself running, and setting the time and quick-set date takes fifteen seconds. The case gets stronger with a Promaster you wear fortnightly, and stronger again if it is one of the day-date references, where resetting the day wheel is a genuine irritation. Our do automatics need a winder guide is the honest version of that conversation, and our Citizen automatic roundup is the page to read if you are still choosing the watch.