Mounted on ball bearings in Eterna Spherodrive fashion, the 3510 movement’s two series-coupled barrels provide the hour, minute and seconds hands with eight full days of exceptionally smooth and regular operation.
Power-reserve indicator with 192-hour graduations. To protect the movement’s highly precise rate, calibre 3510 includes an automatic cut-off of the balance wheel after eight days’ continuous operation.
The calibre 3510 has an oversized date calendar thanks to two discs and a fast-acting date corrector, usable without restriction 24 hours a day and positioned at 10 o’clock on the case side.
By eliminating friction and pressure points that generate major wear and tear, the Eterna Spherodrive permits more precise meshing with the gear train, hence more efficient transfer of energy. It also allows the use of a thinner mainspring, thereby increasing the movement’s power reserve.
- Calibre : Hand-winding Eterna 3510
- Functions : h, min, s, big date,power-reserve
- Dimensions : 32 x 26 mm
- Height : 6.60 mm
- Lines : 14 1/4 x 11 1/2
- Frequency : 28,800 v.p.h.
- Power reserve : 8 days/192h
- Number of jewels : 23
- Number of ball bearing : 7