Caliber 9SA5 _ The Dual Impulse Escapement increases the transfer efficiency of the power of the mainspring.

The Dual Impulse Escapement is a unique mechanism which combines “direct impulse,” where power is transferred directly from the escape wheel to the balance, with conventional “indirect impulse.” Thereby, it transfers power to the balance through the mainspring with increased efficiency. Conventional wisdom decrees that the more you increase the vibration rate of the balance, the lower the power transfer efficiency. This is because the escape wheel and pallet fork cannot keep up with the high oscillation speed. This challenge is met in Caliber 9SA5 as it has new components made with MEMS technology to increase the escapement efficiency. Connecting these to the twin barrels allows for 10 beats per second while delivering a continuous operation period of 80 hours.