Hamilton caliber H-31

Hamilton Caliber H31

Hamilton caliber H-31

Caliber NumberH-31
Base CaliberETA/Valjoux 7753
Movement TypeAutomatic
Power Reserve60 hours
Vibrations Per Hour28,800
Shock SystemIncabloc
FeaturesChronograph, date at 6:00, 30 minutes counter at 3:00
Country of ManufactureSwitzerland
Known ModelsH35756735

Found in the Hamilton Pan Europ limited edition watch, this caliber H-31 is based on the ETA/Valjoux 7753.

The H-31 variant of the 7753 features a custom designed H pattern on the bridge, and engineered for increased accuracy and an increased 60 hours power reserve instead of 42 hours.

Hamilton ETA H31

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Please share your experiences and thoughts about the Hamilton caliber H-31 in the comments section below…

Also see Hamilton caliber H-21 here.

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Hamilton Caliber H-21 Watch Movement | CaliberCorner.com
6 years ago

[…] Also see Hamilton caliber H-31 here. […]

David Callan
David Callan
3 years ago

Also found in Mido chronographs as the ETA AO5.H31 as a bicompax 30 minute chronograph.

Odai Abaisat
Odai Abaisat
2 years ago
Reply to  David Callan

Also now the same movement AO5.H31 found in Certina DS CHRONOGRAPH AUTOMATIC ref.C038.462.16.037.00

Venus Caliber 178
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