At Watches and Wonders 2026, Bart and Tim Grönefeld quietly showed a finished prototype of the 1941 Quadrivium under embargo, offering a first look without photography. The official images will arrive at the end of 2026, which suits a watch that asks for patience.
The name nods to a classical quartet, and the mechanics follow suit: a 7.5-seconds remontoire, a one-minute flying tourbillon, central jumping seconds, and a power reserve indicator. Power comes from serially connected concentric twin barrels. The movement counts 473 components. It is a compilation of the brothers’ favored ideas, hence the wry nickname “Grönefeld’s Greatest Hits.”
The case uses the familiar 1941 architecture, here in tantalum at 40.0 mm by 11.3 mm. A platinum run is planned after the Premiere Edition. Under sapphire, a frosted main dial carries hand-bevelled stainless steel elements, polished multi-faceted white gold hour markers, and heat blued hands. Displays are cleanly staged: raised flying tourbillon at 6 o’clock, exposed governor at 9 o’clock, power reserve at 10 o’clock with 50 hours indicated, and hours-minutes at 2 o’clock, while a large central hand delivers the jumping seconds.
The Premiere Edition is limited to 28 pieces in tantalum, priced at €280,000 before taxes. Platinum will follow in a limited series of 28 at €310,000 before taxes. Deliveries are slated for late 2026 to early 2027.
Context matters. Earlier icons – One Hertz, Parallax Tourbillon, Remontoire – are long discontinued, yet continue to loom large. The Quadrivium gathers their spirits into one measured composition, more synthesis than spectacle. On the wrist, that intent should matter more than any photo.
Also shown in Geneva, the seven unique “7 Sins” watches engraved by Kees Engelbarts have already found a new owner. The fair itself welcomed 60,000 visitors. The Grönefeld booth seemed content to let the mechanics do the talking.
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