Eterna caliber 3903A

For years Eterna Movement has focused its efforts on enlarging both its manufacturing technologies as well as its portfolio of movements. Thanks to the modularity of the calibre 39, the same base movement can give rise to a total of 88 different movement versions. As caliber 3903A, it has a small seconds counter and a date display. Case fitting diameter: 30.0 mm Height: 5.6 mm Vibrations per hour: 28’800 v.p.h. Power reserve: 65 h No. of jewels: 29 No. of ball bearings: 1