Grönefeld 1941 Quadrivium: Price, Specs and a Sold-Out Tourbillon

Four complications, one dial, and not a single watch left to order. With the 1941 Quadrivium, the Dutch brothers Bart and Tim Grönefeld have gathered every mechanism they are known for into a 40 mm case, and both editions are already listed as sold out.

What is the Grönefeld 1941 Quadrivium?

The Quadrivium is the most complicated watch yet from Grönefeld, the independent house run by brothers Bart and Tim Grönefeld from Oldenzaal in the Netherlands. Monochrome Watches, which published full details on September 23, calls it the brothers’ “most ambitious watch to date”. It was first shown privately, under embargo, to a small group of collectors during Watches and Wonders Geneva in April, according to Grönefeld, and has only now been presented in full.

The name is borrowed from classical learning, where the quadrivium was the group of four higher arts: arithmetic, geometry, music and astronomy. Here it stands for four signature complications driven by a new hand-wound movement, the G-09, built from 473 components with 49 jewels, as reported by Watch Collecting Lifestyle.

How do the four complications work together?

At six o’clock sits a one-minute flying tourbillon with a three-spoke steel cage, supported from below only, so the regulating organ appears to float. At nine o’clock, the governor of the remontoire turns in plain view. The remontoire is a small secondary spring that is rewound every 7.5 seconds and then releases a steady, measured impulse to the regulator, smoothing out the gradual loss of force as the mainspring unwinds.

The third complication is a large central seconds hand that jumps once per second rather than sweeping, thanks to a dedicated jumping-seconds module. It stops and resets to zero when the time is set, for precise synchronising. The fourth is a power reserve display at the upper left, reading the 50 hours stored in two concentric barrels connected in series. The balance is free-sprung, in titanium, with a Phillips overcoil, beating at 3 Hz.

The display follows the logic of the movement. Hours and minutes sit off-centre between twelve and three on a frosted dial, launched in a colour Grönefeld calls Sand, with hand-bevelled steel elements, faceted white gold markers and heat-blued steel hands. Five dial colours are planned in total, according to Watch Collecting Lifestyle.

A short history of the remontoire and the tourbillon

Both complications were born of the same obsession: keeping the force reaching the balance as even as possible. Abraham-Louis Breguet patented the tourbillon in Paris in 1801, placing the escapement in a rotating cage to average out the effects of gravity on a pocket watch carried upright. The remontoire is older still in spirit. John Harrison’s celebrated marine timekeeper H4, completed around 1759 for the search for longitude, used a small remontoire rewound every 7.5 seconds, the very interval Grönefeld has chosen here.

For Grönefeld, the constant-force idea is a family signature. The family’s workshop dates to 1912, and the brothers have built their reputation over nearly two decades on mechanisms that other independents admire but rarely attempt, from the GTM-06 and the One Hertz with its jumping seconds to the Parallax Tourbillon. The 1941 Remontoire, introduced in 2016, established the case and the architecture on which today’s Grönefeld collection rests. The Quadrivium reads as a gathering of that whole lineage in a single calibre.

A tourbillon, a remontoire and jumping seconds, each given room to be seen at work, in a case no larger than a classic dress watch.

How much does the Grönefeld Quadrivium cost?

Grönefeld lists the Premiere Edition of 28 pieces in tantalum at €280,000 and the following edition of 28 pieces in platinum at €310,000, both excluding taxes and shipping. Watch Collecting Lifestyle converts these to about $319,000 and $353,000 at the time of writing; the final figure in dollars will depend on exchange rates and local taxes, so confirm with the brand.

The choice of tantalum for the Premiere Edition is telling. A dense, blue-grey metal that is notoriously difficult to machine and polish, it has become a quiet marker of seriousness among independent watchmakers. The tantalum model weighs about 108 grams on its strap and the platinum about 120 grams, per Watch Collecting Lifestyle.

In our view, the Quadrivium’s strength lies in restraint. At 40 mm and 11.3 mm, it carries four complications without the bulk that often comes with a tourbillon, and it places the mechanisms where the eye can follow them. It sits naturally alongside other recent high-watchmaking releases we have covered, such as the Girard-Perregaux Laureato Fifty Tourbillon and the ultra-thin Bulgari Octo Finissimo Dual Time x Vianney Halter, but it speaks to a different collector: one who values a constant-force movement over a famous name on the dial.

For the Collector

• Where to buy: Grönefeld sells directly; its Quadrivium page currently states that, “due to high interest and limited capacity”, it cannot accept new orders for the time being.
• Price: €280,000 (tantalum) and €310,000 (platinum), excluding taxes; confirm current pricing and any future editions with the brand.
• Delivery: the first watches are scheduled from late 2026 to early 2027, so allow for a wait even with a confirmed allocation.
• What drives value: a small independent output, two editions of just 28 pieces, the Premiere Edition’s tantalum case and the house’s record in constant-force watchmaking.
• Resale: no secondary-market price exists yet. Past auction results for independent watches vary widely, and past prices do not predict future value.

For more of the season’s new releases, see our guide to the best new watches of Geneva Watch Days 2026.

Frequently asked questions

How much is the Grönefeld 1941 Quadrivium?

Grönefeld prices it at €280,000 in tantalum and €310,000 in platinum, excluding taxes, or roughly $319,000 and $353,000 at the time of writing.

How many Grönefeld Quadrivium watches will be made?

Two limited editions of 28 pieces each, one in tantalum and one in platinum, for 56 watches in total. Both are shown as sold out on Grönefeld’s website.

What is a remontoire in a watch?

A remontoire is a small secondary spring that is rewound at regular intervals and delivers a steady force to the regulator. In the Quadrivium it rewinds every 7.5 seconds, with its governor visible at nine o’clock.

Why is it called Quadrivium?

The name refers to the four classical arts of arithmetic, geometry, music and astronomy, and to the watch’s four signature complications.

Sources: Grönefeld · Grönefeld, 1941 Quadrivium Platinum · Monochrome Watches · Watch Collecting Lifestyle · WristReview