This watch is also known as:
501/6P , 501.6P , 501-6P .
With its 506 minuscule parts, the Ref. 5016 represents a milestone in horological prowess, by uniting in its gold or platinum case the most coveted complications: a tourbillon, a minute repeater, a perpetual calendar with a retrograde date hand, and a moon phase display. Small second hand Sapphire crystal case back Manually wound wristwatch with tourbillon escapement Minute repeater, perpetual calendar with retrograde date hand and phases of the moon Day, date, month and leap year indicators .