The short version. Wind with the crown pushed in, clockwise, until it stops — about 28 to 50 turns, but go by feel, not count. You cannot overwind it by hand. Set with the crown pulled out. The 3861 hacks; the 1861 needs the back-pressure trick.
The crown has two positions
- Position 1 — pushed fully in. The wearing and winding position. The crown must be here for the watch's water resistance to mean anything.
- Position 2 — pulled out. Time setting. The classic Moonwatch has no date, so there is no intermediate date position.
- Turn the crown forwards or backwards in position 2 — either direction moves the hands, per Omega's own manual.
Setting the time, by caliber
Caliber 3861 — it hacks
- Pull the crown to position 2 and the seconds hand stops.
- Set the hour and minute hands, wait for your reference time signal, then push the crown home exactly on the signal.
Caliber 1861 / 1863 / 1866 — no hacking seconds
- Omega's official technique: pull to position 2, then turn the crown gently backwards and hold light pressure. The seconds hand freezes.
- Release the pressure when the display matches your time signal and push the crown back in.
- Collectors call this "back-hacking." It is straight from the Omega manual — not a hack in the pejorative sense, despite what one forum dealer once claimed.
Winding: by feel, not by count
- Wind with the crown pushed in, turning clockwise — the top of the crown moving away from you. Counter-clockwise does nothing; the mechanism only engages one way.
- From a dead stop expect roughly 30 to 50 full rotations. An Omega-qualified watchmaker puts the 1861 family at 28 turns; owners report anywhere from 40 to 80 depending on how they count. Go by the resistance, not the number.
- Fully wound feels like a firm, unmistakable stop. Do not force it past that point — but do not be timid getting there either.
- Wind it off the wrist. Winding on-wrist bends the stem at an angle, slowly stressing it. Hold the watch in your hand, thumb and forefinger on the crown.
"Can I overwind it?" — effectively, no. With normal finger force you cannot break the mainspring; the hard stop at full wind is the protection (manual-wind Speedmasters have no slipping bridle — that is an automatic-movement feature). Only deliberate abuse — pliers, muscling past the stop — could do damage. Wind it fully, with common sense.
How often
- Daily wearer: wind fully once a day, ideally at the same time. A consistent state of wind gives the most consistent timekeeping.
- Occasional wearer: wind it when you wear it. Letting it run down between wears is harmless.
- Power reserve: 48 hours on the 1861, 50 on the 3861. Topping off mid-day is fine — just don't force past the stop.
Date models: the midnight rule
- On date-equipped Speedmasters (Moonphase, '57, Racing), pull to position 2 and turn backwards to quick-set the date. Confirm the date sits centered in its window.
- Mind AM/PM: after setting, advance the hands through 12 and watch whether the date flips — that tells you whether the watch thinks it's AM or PM, so the date changes at midnight, not noon.
- Never quick-set between 8 pm and 2 am. The date-change mechanism is physically engaging in that window; forcing it can damage the date jumper and spring. This one comes straight from Omega.