1941 Quadrivium Platinum Limited edition of 28 pieces
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. The 1941 Quadrivium unites four of the brand’s most admired complications within a single, extraordinary watch. Developed entirely from the ground up, it features a 7.5-seconds remontoire, a one-minute flying tourbillon, central jumping seconds, and a power reserve indicator, all driven by a movement equipped with serially connected concentric twin barrels.
Crafted with the utmost precision and attention to detail, the Premiere Edition will be limited to 28 pieces, each housed in a 1941 Tantalum case measuring 40.0 mm in diameter and 11.3 mm in height. A further limited edition of 28 pieces is available with a case and buckle crafter from Platinum.
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.
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.
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.
technical specifications
Calibre G-09
Mechanical hand-wound movement; tourbillon, remontoire, dead seconds and power reserve indicator
Movement
Diameter 32.0 mm
Thickness: 6.15 mm
Number of components
473 parts in the whole movement
Number of jewels
49 jewels, partially set in gold chatons
Power reserve
50 hours
A satellite-wheel mechanism provides a precise indication of the remaining power reserve
Barrels
Two coaxially arranged barrels connected in series toprovide a continuous and balanced energy supply
Tourbillon
One minute flying tourbillon cage made in stainless steel Durnico
Balance wheel
Titatium free sprung variable inertia balance wheel (10.0 mm diameter)
Frequency
21.600 vibrations/hour
Balance spring
Phillips terminal overcoil curve; Geneva-style stud
Escapement
Swiss lever escapement
Main Plate
Spotted and snailed ruthenium plated brass
Bridges
Hand bevelled; stainless steel. Micro-blasted centre; circular grain on the top; relief engraved in the micro blasted surface
Dead seconds
A dedicated dead-seconds mechanism, positioned above the conventional going train, allows the escapement to operate at its natural frequency while regulating the seconds-hand to advance in precise one-second intervals
Winding-setting
Conventional winding and setting mechanism; hacking seconds at the 60 seconds position
Case
1941 Design. Round, three-piece case featuring a domed sapphire crystal on the front, with anti-glare treatment on both sides. The flat sapphire crystal on the case back is also treated with anti-glare coating on both sides. The case is engraved with the serial number and secured by eight security screws
Number of components
Case: 24 parts
Dial/hands: 27 parts
Case dimensions
Diameter: 40.0 mm
Thickness: 11.3 mm
Water resistance
3 atmospheres - 30 meters - 100 feet
Crown
Engraved with “G” logo
Dial
Base dial in brass, applied stainless steel segments and white gold hour markers. Choice of 5 colors
Hands
Hours and minutes, large counter poised seconds,power-reserve. All hands are steel and heat blued
Indications
Small hours and minutes at 2 o’clock
Extra long jumping seconds hand at the center
Power reserve indicator at 10 o'clock
Visible flying tourbillon cage at 6 o’clock
Visible governor of the remontoire mechanism at 9 o'clock
Strap
Hand-sewn leather, 20mm-18mm
Buckle
Tantalum or Platinum pin buckle, engraved with Grönefeld logo. 18mm
Weight
Tantalum approximately 108 grams, including strap and buckle
Platinum approximately 120 grams, including strap and buckle
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