Grönefeld’s 1941 Quadrivium brings four horological feats into one watch

Bart and Tim Grönefeld have unveiled the 1941 Quadrivium, a watch that brings together four mechanical ideas central to their independent atelier in Oldenzaal. Its name invokes the quadrivium of classical education—arithmetic, geometry, music and astronomy—while the movement combines a constant-force remontoire, a flying tourbillon, centrally displayed jumping seconds and a power-reserve indication. The resulting dial is deliberately architectural rather than crowded.

The raised one-minute flying tourbillon occupies six o’clock, while the exposed remontoire governor turns every 7.5 seconds at nine. Hours and minutes move to an off-centre subdial at two; the power-reserve display at ten shows the approximately 50 hours available from serially connected concentric twin barrels. Blued hands and polished white-gold indices provide graphic clarity against the finely frosted surface.

The 1941 case is 40 mm in diameter and 11.3 mm thick. Behind a sapphire display back sits a completely new movement assembled from 473 components, finished with the meticulous decorative care that has become Grönefeld’s signature. The Premiere Edition comprises 28 tantalum watches, with a further 28 in platinum. The manufacturer's announced prices are €280,000 and €310,000 respectively, before tax.

The Quadrivium was previewed in spring 2026 before Grönefeld’s detailed September 23 launch. Deliveries for the premiere edition are expected from late 2026 into early 2027. This story describes the manufacturer's claims and published photographs; it is not a hands-on review.