Grönefeld revives four discontinued watches in one 473-part Quadrivium

Grönefeld has unveiled the 1941 Quadrivium, a new watch that revives three of the Dutch atelier's most requested discontinued complications inside a single case. The movement combines a 7.5-second remontoire with exposed governor, a one-minute flying tourbillon and central jumping seconds, alongside a power reserve indicator, all built by brothers Tim and Bart Grönefeld.

The deadbeat seconds trace back to the brand's One Hertz of 2010. The tourbillon references the Parallax Tourbillon of 2014, which won a prize at the Grand Prix d'Horlogerie de Genève. The remontoire itself comes from the 1941 Remontoire launched in 2016, a watch that later became one of the earliest limited editions produced with a watch publication.

That 1941 Remontoire remains the design foundation for every current Grönefeld model, including the automatic 1941 Principia, the Decennium Tourbillon and the 1941 Grönograaf. The Quadrivium borrows the family's fluid case lines, concave bezel and lug profile, and its sculpted casebands, then adds the new movement on top.

The case measures 40mm across and 11.3mm thick, offered in either tantalum or platinum, with sapphire crystals on both sides and the brand's familiar conical crown. Both metals are among the densest used in watchmaking, so the compact dimensions still carry noticeable heft on the wrist despite the modest footprint.

The dial is finely frosted and shown in a soft champagne tone for press images, though Grönefeld says five base colors will be announced later on its own website. An off-center hours and minutes display is between 12 and 3 o'clock, framed by polished, multi-faceted white gold hour markers and blued steel hands.

A power reserve indicator with its own blued hand sits at upper left, while the flying tourbillon dominates the dial at 6 o'clock in a hand-finished, three-spoke stainless steel cage with a stop mechanism that resets it to zero. The exposed constant-force governor rotates at 9 o'clock, once every 7.5 seconds.

Turning the watch over reveals a movement built on the architecture of the 1941 Principia and 1941 Remontoire, with 49 jewels and 473 components in total. Concentric twin barrels connected in series deliver a 50-hour power reserve, engineered chiefly to feed smoother, steadier torque to the tourbillon and remontoire.

What the finishing looks like

The bridges are triangular at the periphery, a nod to the gabled roofs of old Dutch houses, with a long transversal bridge running through the center and large rubies set in gold chatons. Steel finger-like bridges are hand-finished, with dark-coated micro-blasted recesses, bas-relief engravings and black polished steel parts throughout.

What it costs and how many exist

The 1941 Quadrivium comes as two limited runs of 28 pieces each. The Premiere edition, in tantalum with a leather strap and tantalum buckle, is priced at €280,000 excluding taxes, with first deliveries scheduled for 2027. The platinum follow-up run, also limited to 28 pieces, is priced at €310,000.

For comparison, that tantalum price runs roughly $30,000 above F.P. Journe's Tourbillon Souverain Vertical, a watch with broadly similar functions built around a vertical rather than flying tourbillon. At this level, collectors are as likely to own both pieces as to choose between them.

Grönefeld's own website already shows order pauses on other current models, citing demand that outstrips the small independent brand's production capacity. That suggests the Quadrivium's six-figure price is unlikely to deter buyers who have followed the brothers since the One Hertz and Parallax Tourbillon first built their reputation among collectors.

We have tracked how independent watchmakers keep reworking their own back catalogues rather than chasing entirely new complications, a pattern that also runs through our coverage of Perrelet's stone-dial Weekend pieces and Chopard's revival of its 1976 Happy Diamonds design. Grönefeld's approach here is the same instinct at a far higher altitude.

Where a remontoire, a tourbillon and jumping seconds fit within the broader hierarchy of mechanical watchmaking is something we address in our guide to watch complications, which situates constant-force devices among the more difficult problems independent makers choose to solve. The Quadrivium folds three of those problems into one caliber at once.

Deliveries of the tantalum Premiere edition are set to begin in 2027, with the platinum run to follow on the same production schedule.