25657OR, Perpetual Calendar, Mother of Pearl Dial, Pink Gold 3310 An early ref

An early ref

The design stems from an oversized mainspring

806 Navitimer with a Valjoux 72

made with a day and date corrected by pushers flanking the screw-down crown

It even has its original caseback sticker on

25657OR, Perpetual Calendar, Mother of Pearl Dial, Pink Gold 3310 An early refA ref. 25657OR Audemars Piguet Quantime Perptuel with a mother of pearl dial. There are only 362 examples of this reference to start, but it is estimated that no more than a handful were ever made with mother of pearl dials. This was, in its day, the worlds thinnest perpetual calendar at 3. 95mm, the watch that proved mechanical complication still had its place in the market against the growing shadow of quartz. Its historic significance stands alone,