Hamilton Caliber H31
|Base Caliber||ETA/Valjoux 7750|
|Power Reserve||60 hours|
|Vibrations Per Hour||28,800|
|Features||Chronograph, date at 6:00, 30 minutes counter at 3:00|
|Country of Manufacture||Switzerland|
Found in the Hamilton Pan Europ limited edition watch, this caliber H31 is a variation of the ETA/Valjoux 7750. This Swiss made automatic movement has 27 jewels and an upgraded power reserve of 60 hours.
Interesting to note that although this watch is from Hamilton and the movement is a 7750, Swatch Group chose to label this caliber as “Cal. ETA H31” on the Hamilton site – instead of calling it a Hamilton H31 as many watch companies would do.