Audemars Piguet Star Wheel 25720PT Purple B&P

Audemars Piguet Star Wheel 25720PT, Openwork 'Tropical Purple' Guilloché, Box & Papers, AP Service Card 2007, extra engraved dial
Serial: D7941 / Mvt 355911
Circa: 1990's
Reference: 25720PT

DIAL: Openwork, three sapphire disks on top of the dial with printed hours rotating on a center wheel with star wheels connected under each sapphire disks and the rotating center wheel. The minutes scale printed on a 120-degree sector across the upper periphery of the dial and indicated as the hour-discs glide over the minutes track. The bottom portion of the dial is decorated in guilloché.

CASE: 36mm, Platinum 950, sapphire crystal on the front & on the back

MOVEMENT: Caliber 2124, automatic, 33 jewels

BRACELET: Leather strap with Audemars Piguet PT950 ardillon buckle

CONDITION REPORT: Worn, mint condition, the case is unpolished and all hallmarks and numbers are ultra crisp. The dial has aged and turned a vivid purple color.

NOTES: Includes box, warranty booklet, AP service card from 2007 and additional engraved dial on the side.

The wandering hours clock is believed to have been invented in 1655 by the special request of Pope Alexander VII, who suffered from insomnia and could not stand the ticking of his clock. This complication was re-released by Audemars Piguet in 1991 as a wristwatch in the refence 25720 with a similar profile case and base movement as their ultra-thin perpetual calendar. The exposed mechanism displays the minutes on a semi-circle at the top of the dial Indicated by whichever of the three rotating hour discs is in position at that time.
Under each hour disk a star shaped wheel is visible giving this model its name. The model was short lived and soon discontinued after only 5 years in production.
It was also the year that the brand discontinued the whole lineup of classic models with the short lugs, stepped bezel and round 36mm cases that had been the base for all AP classic models since the late 1970’s.