Oris Caliber 677

Manufacturer	Oris
Caliber Number	677
Base Caliber	ETA 7754
Vibrations Per Hour	28,800 bph
Power Reserve	48 hours
Jewels	25
Functions	Hours, minutes, small seconds, chronograph, gmt, date
Country of Manufacture	Switzerland
Known Models	Oris TT3

The Oris caliber 677 is a modified version of the ETA/Valjoux caliber 7754.

The caliber 677 in the photo above was found in this Oris TT3 Second Time Zone Chronograph watch.

Have you had experience with this caliber from Oris? Talk about it in the comments below.