
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.

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.
I have dedicated a thread to it: www.watchprosite.com Enjoy this little gem! Best, Emmanuel
yes, i have read it..... I've known about this watch for a while now, the stars just never aligned until recently.
it's super slim too....so it doesn't look like a tourbillon at all. It wears more like a Cartier tank.
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
Vintage is coming more in the picture these days...
If every I was to buy a tourbillion it would be this. Just fantastic piece of design all around.
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