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There is also an Omega caliber 911 which came later to address some requests from customers (Ref: 145.036 and 145.026). One of the issues that Flightmaster owners had was that they could not quickly tell if the watch was running or not. The cal. 911 (based on caliber 861) added a small seconds subdial at 9:00 which replaced the 910’s 24 hour / AM/PM subdial. This allowed wearers to see that the watch was operating without having to engage the chronograph.
Versions:
- 860: 17 jewels, base caliber Lemania 1872.
- 861: 17 jewels, 12 h. counter, base caliber: Lemania 1873.
- 862: 21 jewels, 12 h. counter.
- 863: 21 jewels, 12 h. counter, jubilee edition.
- 864: 21 jewels, 12 h. counter, jubilee chronometer.
- 865: 17 jewels, only 60 s. counter, chronostop.
- 866: 17 jewels, like 860 with date, moon phase.
- 867: 21 jewels, 12 h. counter, jubilee chronometer, skellettonized.
- 910: 17 jewels, 12 h. counter, 2nd time zone, 24 h. display.
- 911: 17 jewels, 12 h. counter, 2nd time zone.
- 920: 17 jewels, only 60 s. counter, date, chronostop.
- 930: 17 jewels, like 860 with date.
