ETA caliber A31.501

Brand:ETA
Reference:A31.501
Movement:Automatic
Display:Analog
Diameter:25.60
Jewels:21
Reserve:64
Frequency:25200
Hands:Hours, Minutes, Small Seconds
Astronomical:Moonphase

A31.501 description

Self-winding movement with power reserve of 64 hours.
Silicon balance spring.

Other calibers that are based on the ETA A31.501: