Seiko Premier Perpetual Calender SNQ148 SNQ148P1 SNQ148P Men's Watch One watch that brings you elegance and precision without taxing your finances. Others won’t know about the marvellous, ultrasonic motor within, integrated to the main circuit that drives the perpetual calendar; it is a one-of-a-kind mechanism that’s exclusive to Seiko. So bid goodbye to all the hassles related to date adjustments, including those for the leap years. Just enjoy it while it’s on your wrist and off it.