Jaeger-LeCoultre Master Control 40mm Mens Watch Q4148420With the new Master Control Calendar, the moon phase offers a horological complication, a jumping date, which flies between the 15th and 16th day of the month. New to the Master Control collection, this mechanism ensures you never lose sight of the moon phase, located in an aperture at 6 o'clock. In its stainless steel version perfectly matched with its sunrayed silver dial, the Master Control Calendar offers a complete calendar. Under a sapphire crystal case-back, the reverse of the watch reveals the components of its new generation caliber, which promises a 70-hour power reserve.