Audemars Piguet Quantième Perpétuel Automatique

About this reference

The Audemars Piguet Quantième Perpétuel reference 25736PT was produced during the 1990s as a skeletonized execution of the brand’s ultra-thin perpetual calendar line. Collectors value this reference for its 33mm platinum case and the caliber 2120/2800, a self-winding movement based on the Jaeger-LeCoultre 920 base with a perpetual calendar module. The open-worked dial features four sub-dials for day, date, month, and moon phase, often accented by blued steel hands and white sub-dial rings for legibility. Its rarity is defined by limited production numbers compared to standard solid-dial variants. On the secondary market, this reference typically trades in the $60,000 to $90,000 range depending on the presence of the original box and papers. A notable production detail is the use of a sapphire caseback, which was a transition from the solid casebacks found on earlier 25656 or 25668 references.