Hamilton caliber H-21 Si

Ref. H-21 Si

The Hamilton caliber H-21 Si is an automatic movement with a 60-hour power reserve, beats at 28,800 vph, and carries 25 jewels.

Variation of Hamilton's H-21 self-winding chronograph movement, here with silicon balance spring.

Type
Automatic
Display
Analog
Power reserve
60 h
Frequency
28800 vph
Jewels
25
Diameter
30 mm
Complications
Chronograph, Chronometer, Date, Day, Hours, Minutes, Small Seconds
Base caliber
ETA caliber 7750

Used in

10 models