Grönefeld has built a new calibre that gathers the complications from three watches it no longer makes. The 1941 Quadrivium carries a 7.5-second remontoire, a one-minute flying tourbillon, central jumping seconds and a 50-hour power reserve, in a 40mm case 11.3mm tall. It launches in Singapore with Sincere Fine Watches, in two editions of 28 pieces.
Peter saw and handled the watch as he bumped into the brothers in Geneva during GWD26, and took some iPhone photographs, shared here as Live Photographs, and Wrist Roll video. We begin with our commentary and analysis, with handling notes by Peter. This is followed by the complete official Grönefeld press release.
Grönefeld Greatest Hits – the 1941 Quadrivium: Remontoire, Flying Tourbillon And Jumping Seconds
Price, Specifications & Official Press Release
The Grönefeld 1941 Quadrivium retails at SGD 473,100 for the Première Edition in tantalum and SGD 523,800 for the Platinum Edition. Each edition is limited to 28 pieces. Prices include GST of 9%.
Deployant’s Commentary & Analysis
The press release reaches for a nickname early, and “Grönefeld’s Greatest Hits” is accurate enough as shorthand. Three of the watches that built the brand’s reputation are out of production: the One Hertz, the Parallax Tourbillon and the 1941 Remontoire. The complications that distinguished each of them appear here. Bart and Tim Grönefeld did not raid the parts bin to do it, because the calibre was drawn from scratch for this watch. It runs to 473 components and 49 jewels, on twin concentric barrels connected in series.
At 40.0mm across and 11.3mm tall, the case is the 1941 shape the brand has used since 2016. Four indications, one of them a raised flying tourbillon, fit inside a height that plenty of watches with three hands and a date fail to reach. That is possible because nothing on the dial is stacked. Hours and minutes sit in a sunken register at 2 o’clock, the power reserve arcs across 10, and the governor is cut into the plate at 9. The tourbillon has the bottom third of the dial to itself, and the seconds hand crosses all of it from the centre.
The central seconds hand steps once a second. Grönefeld did the same thing on the One Hertz. The hacking is arranged so the tourbillon comes to rest with the seconds at 60. A watch set that way can be synchronised to the second. The governor at 9 o’clock will hold attention longest, an exposed wheel that spins up and halts eight times a minute as the remontoire releases. Most movements keep that under a plate.
Singapore gets the launch, with Sincere Fine Watches as the partner. A Dutch independent with 56 pieces to allocate did not need to introduce them in Europe. The dial colours are not settled, or not published, with five base colours promised on the brand’s website weeks after the launch. Half the run is tantalum for the Première Edition, half platinum.
Handling and Wearing the Grönefeld 1941 Quadrivium
Peter Chong notes: The watch is rather well sized given the complications it carries. At just 40mm in diameter and 11.3mm high, the Quadrivium wears very nicely, as shown in this quick wrist roll I did (click on image to see the roll). The lugs are tipped inwards to allow the case to sit nicely on the wrist.
Again, as usual, my left wrist is 180mm in diameter and is rather flat where the case sits, and I am able to wear most watches, even large ones comfortably. But the Quadrivium, bearing current sentiments on case size should wear well on most wrists. The tantalum version which I tried on does not feel particularly dense or heavy.
Pricing notes
Prices are as released for Singapore, and no other market has been quoted. Platinum costs SGD 50,700 more than tantalum. Nothing else in the specification separates the two editions. The retail does seem to be rather on the high side for a watch of this complication – a remontour tourbillon with a jump seconds. Perhaps it may be instructive to compare to the other offerings. A recently released watch with these two complications is the Urban Jurgensen UJ-1. This carries a retail of CHF 368k in a platinum case. Comparing well with the Quadrivium in platinum’s SGD 523k (about CHF 338k).
More Grönefeld on Deployant: Review: Grönefeld 1941 Remontoire, Review: The Grönefeld 1941 Principia Special Edition for Sincere Fine Watches, and Watching the CEOs: Bart Grönefeld on the new releases for 2025.
Grönefeld 1941 Quadrivium Specifications
- Case: 1941 design language, 40.0mm diameter, 11.3mm height
- Case material: tantalum (Première Edition) or platinum (Platinum Edition), with matching buckle
- Case back: sapphire crystal exhibition back
- Dial: frosted main dial with hand-bevelled stainless steel elements and polished, multi-faceted white-gold hour markers; choice of five base colours
- Hands: blued steel
- Tourbillon: one-minute stainless steel flying tourbillon at 6 o’clock
- Remontoire: 7.5-second remontoire with exposed governor at 9 o’clock
- Seconds: central jumping seconds
- Hacking seconds: smooth tourbillon stop at the 60 seconds position
- Power reserve: 50 hours, displayed at 10 o’clock
- Time display: hours and minutes at 2 o’clock, central jumping seconds
- Movement: concentric twin barrels connected in series
- Movement components: 473
- Limited edition: Première Edition 28 pieces in tantalum; Platinum Edition 28 pieces
- Price: S$473,100 (tantalum), S$523,800 (platinum)
The Official Press Release
Grönefeld Unveils the 1941 Quadrivium: A New Masterpiece by the Horological Brothers
Singapore, September 2026 — After years of sustained demand for several of its most celebrated and now discontinued timepieces, including the One Hertz, Parallax Tourbillon and Remontoire, Bart and Tim Grönefeld proudly introduce a new pinnacle of complicated high horology: the Grönefeld 1941 Quadrivium.
Developed entirely from the ground up, the 1941 Quadrivium brings together four of the independent watchmaker’s most admired complications in a single, extraordinary timepiece: a 7.5-second remontoire, a one-minute flying tourbillon, central jumping seconds, and a power-reserve indicator. The movement is equipped with serially connected concentric twin barrels, providing the energy required to drive this exceptionally complex mechanism.
The result is a technical and artistic achievement that has already earned an affectionate nickname among those who have encountered it: “Grönefeld’s Greatest Hits.”
Four Disciplines, One Exceptional Timepiece
The name Quadrivium originates in classical scholarship, where arithmetic, geometry, music and astronomy were regarded as four foundational disciplines forming an integrated whole. At Grönefeld, the name alludes to the four mechanical complications that define this new creation.
The 1941 Quadrivium brings together the horological ideas and technical signatures associated with some of Grönefeld’s most acclaimed creations, while introducing them in an entirely new movement conceived specifically for this watch.
At 6 o’clock, a raised one-minute flying tourbillon provides a dramatic focal point. At 9 o’clock, an exposed governor rotates once every 7.5 seconds, visually revealing the operation of the remontoire. A large central jumping-seconds hand provides an unmistakable display of the seconds, while the 50-hour power-reserve indicator occupies the 10 o’clock position. Hours and minutes are displayed at 2 o’clock.
A Distinctive Expression of the 1941 Design
First introduced in 2016, Grönefeld’s 1941 case design has become an increasingly iconic element of the brand’s design language, shared by the Remontoire, Principia, Decennium and Grönograaf. The Quadrivium’s case measures 40.0 mm in diameter and 11.3 mm in height.
The dial combines a finely frosted main surface with hand-beveled stainless steel elements and polished, multi-faceted white gold hour markers. Traditional blued steel hands complete the restrained yet highly detailed aesthetic. Collectors can choose from five different base colours for the dial. These colours will be announced on our website a few weeks after the launch.
Turning the watch over reveals a sapphire exhibition case back, offering an unobstructed view of the elaborately finished movement and its 473 components. As with every Grönefeld creation, the architecture and finishing of the calibre are intended not merely to demonstrate technical sophistication, but to make the movement itself an integral part of the watch’s visual experience.
Limited Editions
The Premiere Edition is limited to 28 pieces, each featuring a case and buckle crafted from Tantalum. A further limited edition of 28 pieces is available with a case and buckle crafted from Platinum. The 1941 Quadrivium is priced at SGD $473,100 in Tantalum and SGD $523,800 in Platinum.
With the 1941 Quadrivium, Bart and Tim Grönefeld bring together several of the technical concepts that have defined their work over the years in a completely new expression of high-end watchmaking.
Created in limited numbers and conceived for discerning connoisseurs who value both mechanical ingenuity and traditional hand-finishing, the 1941 Quadrivium embodies Grönefeld’s continuing pursuit of innovation, craftsmanship and horological excellence.
