How to set up the Omega Speedmaster Calibre 321
Short answer: Wind it at crown position 1 until it gets firm, then pull to position 2 to set the time. The 321 has no stop-seconds, so sync it with light backward pressure on the crown. Reset the chronograph only when it is stopped.
Speedmaster Moonwatch Calibre 321 at a glance
| Reference | 311.30.40.30.01.001 (steel) |
|---|---|
| Case | 39.7 mm |
| Calibre | 321, hand-wound, about 55 hours of power reserve |
| Crown | Two positions: 1 = winding, 2 = time. No stop-seconds. |
| Chronograph | Reads to 1/5 second |
What do you need to set on the Speedmaster Moonwatch Calibre 321?
Reset chronograph hands on the Omega Speedmaster Moonwatch Calibre 321
- 1
Check: is the chrono stopped?
Top pusher starts and stops. Bottom resets, but only when stopped.
- 2
Still not at zero? Service
On this mechanical movement the hands are reset by internal cams. There's no user re-alignment, so an authorised service centre needs to fix it.
Pressing pushers in other crown positions won't help, and can cause damage.
Set the time on the Omega Speedmaster Moonwatch Calibre 321
- 1
Pull to position 2
Turn either way to set hours and minutes.
- 2
No stop-seconds: hold it gently
To sync the seconds, turn the crown gently backwards and keep light pressure so the seconds hand pauses. Release on the beat, push to 1.
Based on Omega's published manual: this calibre has no stop-seconds function.
Start a stopped watch on the Omega Speedmaster Moonwatch Calibre 321
- 1
Wind it
Crown in (1). Turn forwards until it stops. Never force it.
- 2
Set the time
Crown to 2, turn, push back to 1.
What owners run into
- The chronograph seconds hand moves in steps of 1/5 second, slightly coarser than the 1/6 s of the 1861 and 3861. Read timings to the nearest fifth.
- People expect a modern relaunch to stop its seconds hand. The re-created 321 doesn't.
- It runs about 5 hours longer than a 3861 on a full wind, but a daily wind is still the easy habit.
How the Speedmaster Moonwatch Calibre 321 differs from similar watches
The crown routine matches the 1861 Moonwatch. The differences are the smaller 39.7 mm case, the 55-hour reserve and the 1/5 s chronograph resolution. Compared with the 3861, there are no stop-seconds.
Quick answers
Does the Speedmaster 321 have hacking seconds?
No. Like the 1861, the 321 has no stop-seconds.
How long does the 321 run on a full wind?
About 55 hours.