Caliber 9SA5 _ A balance with a large moment of inertia and twin barrels that enhance the power reserve

A power reserve of 80 hours is exceptional for a high beat movement. Caliber 9SA5 achieves this with a combination of two technologies. First, the Dual Impulse Escapement has high energy efficiency and, second, the twin barrels deliver more power. In addition, the durability of the movement is ensured by a mechanism which decreases the load placed on the front gear train. Since the twin barrels deliver more power, a 10-beat movement with a balance of large moment of inertia is made possible.