The ETA A05.H31 is known as Hamilton caliber H-31. Based on the 7753 chronograph with extended 60-hour power reserve. Features the classic 3-6-9 chronograph layout.
Movement Type
Automatic
Jewel Count
27 jewels
Power Reserve
60h
Frequency
28,800 vph (8 Hz)
Diameter
30mm
Height
7.9mm
Display Type
Analog
Rotor Type
bidirectional
Winding
ball bearing
Shock Protection
Incabloc
BRAND
ETATYPE
AutomaticSTATUS
In ProductionMANUFACTURE
ÉbaucheCALIBER FAMILY
A05COUNTRY
SwitzerlandALSO KNOWN AS
