FHH | A Focus On The Project P29 by André Beyner & Maurice Grimm

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Project P29 by André Beyner & Maurice Grimm. Project P29 by André Beyner & Maurice Grimm. Project P29 by André Beyner & Maurice Grimm. Project P29 by André Beyner & Maurice Grimm

21 October 2026

A Focus On The Project P29 by André Beyner & Maurice Grimm

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by @watches_and_culture

Before Audemars Piguet made history with the Calibre 2870, there was this: Project P29, a one-off prototype born from the minds of André Beyner and Maurice Grimm.

Just 4.8 mm thick, this 1980s marvel didn't merely house a tourbillon, it paired it with an off-centred oscillating weight, creating the very first automatic tourbillon wristwatch movement ever conceived.

It was lightyears ahead of its time: ultra-thin, self-winding and spinning on itself.

And this exact piece is Prototype No. 1, a relic of engineering genius and a quiet milestone that helped bring mechanical horology back from the brink.

@watches_and_culture

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A Focus On The Project P29 by André Beyner & Maurice Grimm

Before Audemars Piguet made history with the Calibre 2870, there was this: Project P29, a one-off prototype born from the minds of André Beyner and Maurice Grimm.

Just 4.8 mm thick, this 1980s marvel didn't merely house a tourbillon, it paired it with an off-centred oscillating weight, creating the very first automatic tourbillon wristwatch movement ever conceived.

It was lightyears ahead of its time: ultra-thin, self-winding and spinning on itself.

And this exact piece is Prototype No. 1, a relic of engineering genius and a quiet milestone that helped bring mechanical horology back from the brink.