Audemars Piguet Sun Ray Tourbillon: Neo-Vintage Review
Vintage

Audemars Piguet Sun Ray Tourbillon: Neo-Vintage Review

By ck1109 · Mar 15, 2026 · 28 replies
ck1109
WPS member · Audemars Piguet forum
28 replies1166 views1 photos
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ck1109's acquisition of the Audemars Piguet Ref. 25643 'Sun-Ray' tourbillon highlights a historically significant, yet often overlooked, 'neo-vintage' reference. This article delves into why this particular model, the world's first automatic tourbillon and the thinnest for nearly three decades, remains a compelling subject for collectors and horological enthusiasts alike. ck1109's post serves as a valuable entry point for understanding its enduring appeal and market trajectory.

AP ref 25643 in YG Aka the β€œSun-Ray” tourbillon from the 1980s. Rare and quite unknown reference from AP, but still very historically important......This was the first ever automatic tourbillon watch made, and the thinnest at under 5 mm! A record it maintained for nearly 30 years (1986 - 2015) until it was finally beaten by Bvlgari in 2015 (and later Piaget).


Watch by Audemars Piguet, Tradition, Audemars Piguet Ultra-Thin, 25643, Sun-Ray Tourbillon

About the Audemars Piguet Audemars Piguet Ultra-Thin Ref. 25643

The Audemars Piguet reference 25643, introduced in 1986, holds a significant position as the first serially produced self-winding tourbillon wristwatch. This model was notable for its technical achievements at the time of its release, featuring a front-facing tourbillon cage, a design element that allowed for direct appreciation of the complication on the dial. Its introduction marked a notable development in the integration of the tourbillon into a wrist-worn format.

This reference is housed in an 18k yellow gold case measuring 30.5mm in diameter and 4.8mm in thickness. It is powered by the automatic Caliber 2870, which incorporates a hammer/bumper self-winding mechanism, with the blued AP hammer visible on the dial. The movement provides a power reserve of 48 hours. A sapphire crystal protects the white dial, which prominently displays the tourbillon.

For collectors, the reference 25643 is recognized for its historical importance in the evolution of the tourbillon wristwatch. Its technical characteristics, particularly the Caliber 2870 and its visible self-winding mechanism, contribute to its appeal. A bracelet variant, reference 25656, was subsequently introduced in 1987, offering an alternative to the leather strap of the 25643.

Specifications

Caliber
Caliber 2870
Case
18k yellow gold
Diameter
30.5mm
Dial
White
Crystal
Sapphire

Key Points from the Discussion

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The Discussion
QU
quattro
Mar 15, 2026

I have dedicated a thread to it: www.watchprosite.com Enjoy this little gem! Best, Emmanuel

CK
ck1109
Mar 15, 2026

yes, i have read it..... I've known about this watch for a while now, the stars just never aligned until recently.

CK
ck1109
Mar 15, 2026

it's super slim too....so it doesn't look like a tourbillon at all. It wears more like a Cartier tank.

MA
Marc Obermann
Mar 15, 2026

Not only is it a historically significant watch but it is both stunning and a true Ultra Thin watch as well, wear and enjoy it in good health. Marc

PF
pfang56
Mar 15, 2026

Vintage is coming more in the picture these days...

EI
EinPA
Mar 15, 2026

If every I was to buy a tourbillion it would be this. Just fantastic piece of design all around.

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