
Manual-winding Spring Drive
Caliber 9R31
A manual-winding Spring Drive caliber made in the Shinshu Watch Studio, 9R31 has an innovative dual-spring barrel that contains two mainsprings set in parallel and delivers a power reserve of 72 hours.
Especificações
Winding mechanism | Manual winding |
---|---|
Precisão | ±15 seconds per month(±1 second per day) |
Reserva de marcha | Approximately 72 hours |
Número de rubis | 30 jewels |
Características | -Dual-Spring Barrel
-Power reserve indicator |