Omega caliber 861 is Swiss movement from 1960’s.
Functions: 3 register on the dial – 60 seconds, 30 minutes and 12 hours, cam switched, sub second.
The caliber is based on Lemania 1873
Manual-winding movement with 17 jewels.
f = 21600 A/h
Power reserve: 40 hours
Diameter: 27.0 mm
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