Audemars Piguet 4101 Skeleton Stainless Steel Millenary Openworked Automatic, Anthracite & Black Dial w/ Black Off-Centred Disc, 18kt Rose Gold Applied Roman Numeral Hour Markers, Automatic, Sapphire Crystal Exhibition Case Back, Black Crocodile Strap with Stainless Steel Fold-Over Deployant Buckle. Anthracite off-centered dial with Roman numerals, Côtes de Genève finishing, and openworked movement display; Hands: Pink gold-toned with luminescent coating; Subdial: Small seconds at 7 o’clock with contrasting snailed finish. The openworked construction exposes the escapement, gear train, and balance wheel from the dial side, creating an intimate view of the timekeeping heart.

This AP 4101 Skeleton Openworked Automatic in stainless steel is a technically daring and visually arresting expression of Audemars Piguet’s modern haute horlogerie. The Millenary’s distinctive oval case frames an unconventional, off-centered architecture that immediately sets this reference apart from traditional round watches, offering both strong wrist presence and refined balance.

The anthracite and black openworked dial is built around an off-center black time display, fitted with applied 18kt rose gold Roman numeral hour markers and pink gold-toned hands with luminescent coating. At 7 o’clock, a small seconds subdial with a contrasting snailed finish adds depth and visual rhythm. The surrounding openworked structure exposes the movement itself, revealing the escapement, gear train, and balance wheel directly from the dial side. Côtes de Genève finishing, carefully executed bridges, and mechanical symmetry turn the dial into a living display of watchmaking in motion.

Powering the watch is the Audemars Piguet Caliber 4101, a self-winding mechanical movement developed with a reversed architecture, specifically engineered so its functional beauty is viewed from the front rather than hidden behind the caseback. This innovative construction allows the wearer to observe the balance wheel, escapement, and gear train in action, creating an unusually intimate connection with the mechanics. The movement operates at 28,800 vibrations per hour (4 Hz), delivers a 60-hour power reserve, and is constructed with 34 jewels.

The Caliber 4101 is finished to Audemars Piguet’s exacting standards, featuring Côtes de Genève, circular graining, polished bevels, and chamfered bridges, all fully visible thanks to the openworked and reversed design. A sapphire crystal exhibition case back further showcases the movement’s finishing and depth. The watch is completed on a black crocodile leather strap and secured with a stainless steel fold-over deployant buckle, balancing comfort with sophistication.

Bold, technically innovative, and unmistakably Audemars Piguet, the Millenary 4101 Skeleton is a watch for collectors who appreciate mechanical transparency, unconventional design, and true horological substance. It is not a watch that follows tradition, but one that reinterprets it, placing engineering and craftsmanship front and center.

The 4101 Skeleton Millenary Openworked Automatic is Audemars Piguet at its most creative and uncompromising, where engineering is not hidden but celebrated. With its reversed, openworked movement on full display, this watch offers a rare, almost intimate view into the mechanics that power it, something few modern timepieces can match. Distinctive, technically ambitious, and unmistakably collectible, it’s a watch for those who appreciate innovation over convention and want their horology worn openly on the wrist.

Reference No. 15350ST.OO.D002CR.01