Royal Oak Double Balance Wheel Openworked
Two balance wheels on one axis, and a movement cut away to show them.
Calibre 3132 has two balance wheels and two balance springs mounted on the same staff. They swing together, which improves stability and precision.
The movement is openworked, so there is no conventional dial. The bridges are pink gold-toned, as is the inner bezel, against a steel case and bracelet.
Pink gold screws hold the octagonal bezel. The movement can also be seen through the sapphire caseback.
- Reference
- 15407ST.OO.1220ST.02
- Introduced
- 1972 (Royal Oak)
- Case
- 41 mm, 9.9 mm thick, steel
- Movement
- Calibre 3132, self-winding, openworked
- Power reserve
- About 45 hours
- Water resistance
- 50 m
- Functions
- Hours, minutes, central seconds
- Notable
- Double balance wheel on a single axis
