(Format: dd.mm.yyyy)

Calibre 3505

A half-century after the Eterna Matic, its historic mating of the winding rotor and the ball bearing, comes another technical breakthrough from Eterna. Its innovative Eterna Spherodrive ball bearing seating of the barrel and barrel arbor eliminates practically every drawback of the centuries-old system it replaces.

Calibre 3505

Technical information:

Dimensions: 30 x 24 mm
Height: 4.1 mm
Vibrations per hour: 28’800 v.p.h
Power reserve: 54 h
No. of jewels: 17
No. of ball baerings: 5


Mechanical movement with manual winding system, barrel with Eterna Spherodrive system, central second, indication of hours and minutes, second stop.