For the moment we can’t take new orders until further notice. We are now processing the overwhelming amount of reservations we’ve received after the launch of our 1969 DeltaWorks and 1941 Grönograaf. Thank you for your patience and understanding.
While Grönefeld produced a number of different watches endowed with a variety of complications, it had never made a chronograph… until now.
The 1941 Grönograaf is the latest creation to be conceived in Oldenzaal. It is a classical chronograph, but consistent with the Grönefeld ethos, it incorporates several ingenious details.
The ‘Premiere Edition’ will be encased in the rare metal tantalum and limited to just 25 pieces. Thereafter, Grönefeld will release 188 pieces in stainless steel.
This 1941 Grönograaf is the distillation of three generations of watchmaking know-how, of the professional journeys of both Horological Brothers and the manifestation of their extraordinary passion for horology.
In 2016, Bart and Tim released the 1941 Remontoire, honouring their father, Sjef, by referencing the year of his birth. The 1941 case, measuring 39.5mm, was subsequently used for the Principia automatic and the Decennium Tourbillon and has won favour with many watch collectors.
The sinuously shaped 1941 returns, albeit it is a smidgen larger, measuring 40mm in diameter. However, most notably, the case for the inaugural models, a limited edition of 25 pieces, is formed of the rare metal, tantalum. This material is hard, corrosion resistant, bioinert and exhibits a lustrous, blue-grey gleam. Tantalum is more than twice as dense as stainless steel, heavier than palladium and slightly lighter than gold.
The dial – a Dutch masterpiece
The hours and minutes are shown on an off-centre dial, a detail that first appeared on the 1896 One Hertz and later on the 1896 Parallax Tourbillon. The time is expressed with Lancette hands and the hours are denoted with crisp, trapezoidal indexes. The hands are flame-blued steel, upholding watchmaking tradition, while the centres are mirror polished.
As stated earlier, the centrifugal governor sits at 4 o’clock. When the reset to zero pusher is pressed, the governor bursts into life, not only serving a functional role but delivering a wonderful animated performance.
A 30-minute counter, located at the base of the dial, features a Breguet-style hand. The instantaneous jumping minutes facilitates ease of read-off. A subsidiary seconds display resides at 9 o’clock, while a power reserve indicator, positioned above, is equipped with a pointer, seemingly floating adjacent a track, conveying the status of the mainspring. The central chronograph seconds hand subscribes to the classical Breguet-style and converses with a crisply-marked track positioned on the rehaut, proclaiming the elapsed seconds in an intelligible format.
Tantalum € 165,000.00
Alternative available model
Unlike mass-produced cam-actuated chronographs, the 1941 Grönograaf features a classical configuration, namely a column-wheel and lateral coupling, a combination synonymous with high-end watchmaking. The calibre G-04 is a symphony of 408 parts and a wonderful exemplar of no-compromise watchmaking.
Mindful that chronograph movements are often subject to harsh forces that can sometimes scar hammers and bend hands, The Horological Brothers conceived a less aggressive system, a ‘soft reset’ mechanism. A centrifugal governor, positioned at 4 o’clock, typically seen on minute repeaters, slows down the reset function, thereby proving kinder to components while delivering a fascinating spectacle in the process. The governor includes two solid gold weights.
Depending on the position of the heart-shaped cams for the counter hands, the relevant minutes and seconds hands rotate clockwise or counter clockwise, heightening the sense of mechanical theatre. The 30-minute counter, located at 6 o’clock, features an ‘instantaneous jumping minutes’.
The ruby jewelled hammers lessen the impact when returning to zero. The keyless works features a conical winding pinion and crown-wheel, delivering a smooth winding action. Every detail is intended to augment refinement. The variable inertia balance mitigates positional influence and offers superior rate stability. The Philips terminal overcoil enhances isochronism, effectively causing the balance spring to breathe more concentrically.
The mainplate is embellished with spotting, while the bridges are formed of stainless steel, polished by hand. Moreover, the bridges have micro-blasted centres, circular graining on the top and feature various engravings in relief. The heart-shaped cams, the elongated chronograph bridge, the gold chatons and the screw-heads are embellished with black polishing, performed in the traditional way using diamond paste on a tin plate. Consistent with earlier Grönefeld watches, the finishing is worthy of the term ‘Haute Horlogerie’. Indeed, everything is reassuringly Grönefeld.
|Movement dimensions||Diameter: 32,0 mm
Thickness: 6,15 mm
|Number of parts||408 parts|
|Power reserve||53 hours|
|Number of jewels||45 jewels, partially set in solid gold chatons|
|Chronograph||Column wheel, instantaneous jumping minutes and a soft reset mechanism|
|Balance wheel||Variable-inertia balance wheel with four white gold timing screws (diameter 10 mm)|
|Balance spring||Free sprung with Phillips terminal over coil curve with Geneva style stud|
|Escapement||Jewelled Swiss lever|
|Main Plate||Spotted and ruthenium electroplated brass main plate|
|Bridges||Stainless steel, bevels polished by hand, micro-blasted centre.
Circular grain on the top to highlight the bridges shapes and engravings.
Relief engraved Grönefeld logo and the number of jewels
|Governor||Governor Speed Regulator at 3 o’clock|
|Case dimensions||Diameter: 40,0 mm
Thickness: 11,3 mm
|Water resistance||3 atmospheres – 30 meters – 100 feet|
|Material||Tantalum, limited Initiation Edition of 25 pieces|
|Crown||Tantalum, engraved with The Horological Brothers logo|
|Dial||Stainless steel base with rhodium plated sub-dials and elements, frosted and satin-grained surfaces.
Decentral hours and minutes at 1 o’clock.
Subdial for seconds at 9 o’clock.
Power Reserve indicator at 11 o’clock.
Large central seconds counter.
30 minutes counter at 6 o’clock.
Visible “return to zero” speed regulator at 3 o’clock
|Hands||Extended Lancette hands for hours and minutes. Poised Breguet style chronograph hands. Flame-blued steel and mirror polished centres|
|Buckle||Pin buckle made in tantalum engraved with Grönefeld. 18mm|
|Crystals||Domed sapphire crystal on the front with hard anti-reflective coating on both sides
Flat sapphire crystal on the back with hard anti-reflective coating on both sides
|Number of components||Case: 36 parts
Dial/hands: 40 parts
Complete watch: 484 parts
|Total weight||Tantalum 108 Grams|