Early zenith wrist watch 
39.mm case dimension.
Dial signed with zenith.
Movement in working when  I wound it..

As you seen on the photos please refer to photos.
When winding with crown movement in ticking conditions..

Movement signed with George Favre Lacot founder of the zenith watch company.

A man with a singular vision of watchmaking and the courage to bring innovation and modernity to the heart of tradition, George Favre-Jacot gave rise to the first integrated watch manufacture in Switzerland. When he established his brand in 1865, his objective was to create ‘the perfect watch’: the finest, most precise and most reliable timepiece ever made.