Audemars Piguet Quantieme Perpetual Calendar Ref. 25657BC - very rare - only 16 pieces - very good condition

This Audemars Piguet Quantième Perpétuel, reference 25657BC, comes in white gold with a white dial: day at 9 o'clock, month at 12, date at 3 and moon phase with moon-age scale at 6, with applied baton markers. It is one of only 16 pieces. It sits on a black leather strap with pin buckle, comes as the watch only, without box and papers, and is offered in very good condition.

A perpetual calendar accounts for months of 28, 30 and 31 days and for leap years, so as long as it runs it needs no correction until 2100. Audemars Piguet combines this complication here with a self-winding movement, as the word "Automatic" on the dial shows, in a round white gold case with a stepped bezel. A white gold automatic perpetual calendar from Audemars Piguet.