Longines caliber 23Z is Swiss movement from 1950’s.
Functions: hours, minutes and sub seconds.
The Europe version on the movement have flat hairspring, the U.S.A. version have Breguet hairspirng.
Manual-winding movement with 17 jewels.
f = 18000 A/h
Power reserve: 44 hours
Diameter: 23.3 mm
Other links:
Longines caliber 23Z watch parts
