Greubel Forsey Tourbillon 24 Secondes Architecture Final Edition: Ultimate Farewell to a Horological Icon

The final edition of one of its most radical architectural tourbillons

The Greubel Forsey Tourbillon 24 Secondes Architecture Final Edition marks the closing chapter of one of the most visually radical creations in modern haute horlogerie. First introduced in 2022, the Tourbillon 24 Secondes Architecture broke from conventional watchmaking by treating the movement itself as a three-dimensional structure rather than something hidden inside a case.

Now, Greubel Forsey presents a final expression of that concept, preserving the original vision while refining contrast, depth and legibility. This release also comes as the maison confirms its presence at Geneva Watch Days 2026, where collectors and enthusiasts will once again be able to experience the brand’s latest mechanical artistry.

A Movement Designed as Architecture

Rather than building a watch around a movement, Greubel Forsey conceived the Tourbillon 24 Secondes Architecture as a complete architectural composition. Every bridge, surface and component was positioned not only for performance, but also for visual balance and spatial drama.

The titanium case reflects this philosophy through its unusual convex conical-frustum construction. Measuring 47.05 mm across the caseband and 45.50 mm at the bezel, it integrates sapphire crystal around the entire periphery, allowing light to enter from multiple angles and revealing the movement from the front, sides, above and below.

This transparency transforms the calibre into a mechanical landscape suspended in space, where shadows, depth and reflection become part of the experience.

The Inclined 24-Second Tourbillon

At the centre of the watch’s identity is Greubel Forsey’s signature inclined tourbillon positioned at 6 o’clock. Rotating once every 24 seconds and angled at 25 degrees, the mechanism is designed to improve chronometric performance while delivering a constantly animated display.

The movement consists of 354 components, including an 86-part tourbillon cage weighing only 0.38 grams. Three fast-rotating coaxial barrels provide an impressive 90-hour chronometric power reserve.

Few watches combine this level of technical complexity with such visual openness.

Purity Through Mechanical Transparency

The Architecture concept has always focused on openness and structural honesty. Polished spherical titanium bridges rise from a frosted titanium mainplate, while key components appear almost detached from the base.

Large openworked hands mounted on a tripod bridge display the hours and minutes, accompanied by a small seconds indication and sector-style power reserve display.

Nothing feels decorative for decoration’s sake. Every element exists because it serves either function, structure or legibility.

Final Edition Refinements

For this farewell edition, Greubel Forsey has subtly strengthened the contrast between surfaces to enhance readability and create even greater visual depth.

The design remains restrained and technical. Rather than adding embellishment, the maison refined the architecture itself. It is a reminder that in this watch, the movement is the decoration.

Collectors who followed the original release may also recognise the discreet caseback engraving “Architecture 1”, suggesting from the beginning that the concept could evolve in future forms.

A Significant Farewell

The Tourbillon 24 Secondes Architecture Final Edition is more than the retirement of a calibre. It represents the conclusion of a watch that challenged traditional ideas of how a movement should look, function and inhabit space.

As Greubel Forsey heads to Geneva Watch Days 2026, this final edition stands as both a tribute to the original 2022 concept and a statement of the maison’s continued pursuit of innovation.

Final Thoughts

The Greubel Forsey Tourbillon 24 Secondes Architecture Final Edition closes one of the most daring chapters in independent Swiss watchmaking. Bold, mechanical and intellectually pure, it remains a watch where engineering and design become inseparable.

For collectors of modern horological art, this final edition may become one of the most important Greubel Forsey references of the decade.

For more information, please visit the official Greubel Forsey website.

Explore the watch releases of the Geneva Watch Days 2026.