Oris caliber 677 aka ETA 7754

Oris Caliber 677

Oris caliber 677 aka ETA 7754

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.

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