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[H1] Our Collection
1944 Tanfana1969 DeltaWorks1941 Grönograaf1941 PrincipiaDecennium Tourbillon1941 RemontoireBespoke WatchesParallax Tourbillon1896 One Hertz
[IMG: The horological brothers]
[H2] The world of Grönefeld
A world where craft, creativity, delight, eye for detail and beauty reign. A world where the horological brothers take the time for a bond that transcends friendship alone.view our story
[H3] awards
1944 Tanfana awarded Red Carpet Lady’s Watch Bart and Tim are proud to announce that the 1944 Tanfana has been awarded 'Red Carpet Lady’s Watch' at the TEMPORIS International Awards 2025.Read moreProud winner GPHG Award 2022Great news from Geneva: Bart & Tim Grönefeld were honoured to receive the prestigious GPHG for the 1941 Grönograaf!Read moreGrönefeld wins Best Men's Watch Prize!Another Grand Prix d’Horlogerie de Genève award :-) The ultimate watchmakers dream.Read moreGrönefeld wins 2 prizes in Warsaw Poland!So proud to announce that we have won the Classic Watch and the best of the best called Grand Prix in Warsaw chronos24.plRead more03Oct20251944 Tanfana awarded Red Carpet Lady’s Watch Bart and Tim are proud to announce that the 1944 Tanfana has been awarded 'Red Carpet Lady’s Watch' at the TEMPORIS International Awards 2025.Read more14Nov2022Proud winner GPHG Award 2022Great news from Geneva: Bart & Tim Grönefeld were honoured to receive the prestigious GPHG for the 1941 Grönograaf!Read moreCRAFTSMANSHIP BY THE HOROLOGICAL BROTHERSview our story
[IMG: Craftsmanship by The Horological Brothers.]
[H4] latest news
05May2026BART AND TIM UNVEIL THE 1941 QUADRIVIUMBart and Tim Grönefeld were pleased to exhibit at the record-breaking 2026 edition of Watches and Wonders, held from 14 to 20 April in Geneva. A total of 60,000 visitors from across the globe attended this year’s showcase of horological novelties. At the Grönefeld booth, Bart and Tim, together with the fourth generation, presented the “7 Sins” project, created in collaboration with master engraver Kees Engelbarts. This exceptional set of seven unique watches has since found a new owner. Yet this remarkable project was not the only new creation from the Grönefeld brothers…Read more02Apr2026Seven Masterpieces, One Collector's Set: 7 SinsSome ideas refuse to be rushed… How it began: A meeting of two crafts. For nearly 30 years, Bart and Tim have shared a close friendship with Kees Engelbarts — a Dutch master engraver based in Geneva, renowned for his exceptional craftsmanship. Throughout these years, one idea remained: to combine his art of engraving with their horological creations. Grönefeld and Kees Engelbarts had collaborated before, but in 2022 they set out to make something extraordinary. Today, Bart and Tim present the result: A set of 7 timepieces, each representing one of the 7 Sins. A project defined by patience, mastery, and an uncompromising pursuit of excellence.Read more01Dec2025Wij zoeken horlogemaker(s)Ben jij een gepassioneerde horlogemaker? En een gedreven techneut die zijn/haar vakmanschap tot in de perfectie wil uitvoeren? Lijkt het je leuk om mee te werken aan onze exclusieve horloges? En niet onbelangrijk: deel jij onze passie voor high-end uurwerken? Dan zijn we wellicht op zoek naar jou!Read more14Feb20251944 Tanfana. Gracefully Balancing Art and PrecisionWe are proud to introduce Grönefeld's first ladies' model: the 1944 Tanfana. This ladies’ watch embraces new design codes and employs some materials not previously seen on a Grönefeld timepiece.Read more05May2026BART AND TIM UNVEIL THE 1941 QUADRIVIUMBart and Tim Grönefeld were pleased to exhibit at the record-breaking 2026 edition of Watches and Wonders, held from 14 to 20 April in Geneva. A total of 60,000 visitors from across the globe attended this year’s showcase of horological novelties. At the Grönefeld booth, Bart and Tim, together with the fourth generation, presented the “7 Sins” project, created in collaboration with master engraver Kees Engelbarts. This exceptional set of seven unique watches has since found a new owner. Yet this remarkable project was not the only new creation from the Grönefeld brothers…Read more02Apr2026Seven Masterpieces, One Collector's Set: 7 SinsSome ideas refuse to be rushed… How it began: A meeting of two crafts. For nearly 30 years, Bart and Tim have shared a close friendship with Kees Engelbarts — a Dutch master engraver based in Geneva, renowned for his exceptional craftsmanship. Throughout these years, one idea remained: to combine his art of engraving with their horological creations. Grönefeld and Kees Engelbarts had collaborated before, but in 2022 they set out to make something extraordinary. Today, Bart and Tim present the result: A set of 7 timepieces, each representing one of the 7 Sins. A project defined by patience, mastery, and an uncompromising pursuit of excellence.Read moreall the news
[H5] gallery
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[H5] Instagram
Making the best watches in the world. We love every aspect of it. Coming up with new ideas together, bringing them to life in a design that captures the imagination, working with infinite patience to achieve perfection: it is a blessing to be able to work together every day with so much pleasure.the horological brothersMaking the best watches in the world. We love every aspect of it. Coming up with new ideas together, bringing them to life in a design that captures the imagination, working with infinite patience to achieve perfection: it is a blessing to be able to work together every day with so much pleasure.the horological brothers
[IMG: Up chevron]

03Oct2025
[H2] 1944 Tanfana awarded Red Carpet Lady’s Watch
Bart and Tim are proud to announce that the 1944 Tanfana has been awarded 'Red Carpet Lady’s Watch' at the TEMPORIS International Awards 2025.Creating the Tanfana was far from easy — it challenged us, inspired us, and pushed us forward. That is why it means so much that the Temporis judges see in it the same beauty and significance that we do.We are deeply honoured to receive this award and to take it home to Oldenzaal in the Netherlands. It will proudly stand alongside the Temporis Award we were fortunate to receive in 2016.This recognition is not only for us, but for everyone who made it possible: our family, our suppliers, our incredible team, and, most importantly, the people who give life to our work — the customers who wear a Grönefeld watch with pride.Read more about the 1944 TanfanaSourceall newS postsall AwardsBART AND TIM UNVEIL THE 1941 QUADRIVIUMSeven Masterpieces, One Collector's Set: 7 SinsWij zoeken horlogemaker(s)1944 Tanfana. Gracefully Balancing Art and PrecisionWatchmakers Wanted We're hiring!Bart Grönefeld, member of the GHPG 2024Wij zoeken decorateur(s)Grönefeld Moved To A New BuildingWIJ ZOEKEN VAKIDIOTENThe Grönefeld 1941 Principia Preselected at the GPHGWij zoeken decorateur(s) (m/v)Gemotiveerde horlogemaker gevonden!Grönefeld attends the next SIHHWe made it to the finals of the GPHG!Grönefeld is a member of the FHHGrönefeld exhibits at the Watch Fair LuxembourgVideo of the 1941 RemontoireUnique parallax on quill & padCome and visit us in londonParallax Tourbillon nominatedThe renaissance of the Dutch Golden AgeGrönefeld watchmakers since 1912Grönefeld in the news1944 Tanfana awarded Red Carpet Lady’s Watch Proud winner GPHG Award 2022Grönefeld wins Best Men's Watch Prize!Grönefeld wins 2 prizes in Warsaw Poland!Grönefeld wins SIAR prize in MexicoThe 1941 Remontoire wins its first prize!Parallax Tourbillon wins 2014 GPHG !!Timezone Grönefeld Watch of the Year0024 Special Jury Price for Grönefeld One HertzMaking the best watches in the world. We love every aspect of it. Coming up with new ideas together, bringing them to life in a design that captures the imagination, working with infinite patience to achieve perfection: it is a blessing to be able to work together every day with so much pleasure.the horological brothersMaking the best watches in the world. We love every aspect of it. Coming up with new ideas together, bringing them to life in a design that captures the imagination, working with infinite patience to achieve perfection: it is a blessing to be able to work together every day with so much pleasure.the horological brothers

14Nov2022
[H2] Proud winner GPHG Award 2022
Great news from Geneva: Bart & Tim Grönefeld were honoured to receive the prestigious GPHG for the 1941 Grönograaf!Great news from Geneva: 9 November 2022 The Horological Brothers Bart & Tim Grönefeld were honoured to receive the prestigious Grand Prix d'Horlogerie de Genève in the Chronograph category for the 1941 Grönograaf!Bart and Tim take home their third GPHG award. After winning in 2014 with the Parallax Tourbillon in the Tourbillon category and in 2016 with the 1941 Remontoire in the Men's watch category, this third award is the icing on the cake.Our immense grattitude goes out to our entire team, family and our friends that supply us with the best components available. And of course to our customers that put so much trust in our timepieces.‍Read more about the 1941 Grönograaf‍Sourceall newS postsall AwardsBART AND TIM UNVEIL THE 1941 QUADRIVIUMSeven Masterpieces, One Collector's Set: 7 SinsWij zoeken horlogemaker(s)1944 Tanfana. Gracefully Balancing Art and PrecisionWatchmakers Wanted We're hiring!Bart Grönefeld, member of the GHPG 2024Wij zoeken decorateur(s)Grönefeld Moved To A New BuildingWIJ ZOEKEN VAKIDIOTENThe Grönefeld 1941 Principia Preselected at the GPHGWij zoeken decorateur(s) (m/v)Gemotiveerde horlogemaker gevonden!Grönefeld attends the next SIHHWe made it to the finals of the GPHG!Grönefeld is a member of the FHHGrönefeld exhibits at the Watch Fair LuxembourgVideo of the 1941 RemontoireUnique parallax on quill & padCome and visit us in londonParallax Tourbillon nominatedThe renaissance of the Dutch Golden AgeGrönefeld watchmakers since 1912Grönefeld in the news1944 Tanfana awarded Red Carpet Lady’s Watch Proud winner GPHG Award 2022Grönefeld wins Best Men's Watch Prize!Grönefeld wins 2 prizes in Warsaw Poland!Grönefeld wins SIAR prize in MexicoThe 1941 Remontoire wins its first prize!Parallax Tourbillon wins 2014 GPHG !!Timezone Grönefeld Watch of the Year0024 Special Jury Price for Grönefeld One HertzMaking the best watches in the world. We love every aspect of it. Coming up with new ideas together, bringing them to life in a design that captures the imagination, working with infinite patience to achieve perfection: it is a blessing to be able to work together every day with so much pleasure.the horological brothersMaking the best watches in the world. We love every aspect of it. Coming up with new ideas together, bringing them to life in a design that captures the imagination, working with infinite patience to achieve perfection: it is a blessing to be able to work together every day with so much pleasure.the horological brothers

05May2026
[H2] BART AND TIM UNVEIL THE 1941 QUADRIVIUM
Bart and Tim Grönefeld were pleased to exhibit at the record-breaking 2026 edition of Watches and Wonders, held from 14 to 20 April in Geneva. A total of 60,000 visitors from across the globe attended this year’s showcase of horological novelties. At the Grönefeld booth, Bart and Tim, together with the fourth generation, presented the “7 Sins” project, created in collaboration with master engraver Kees Engelbarts. This exceptional set of seven unique watches has since found a new owner. Yet this remarkable project was not the only new creation from the Grönefeld brothers…After years of sustained demand for some of its most celebrated and now discontinued timepieces, including the One Hertz, the Parallax Tourbillon, and the Remontoire, Grönefeld introduces a new pinnacle of complicated high horology: the Grönefeld 1941 Quadrivium. “Quadrivium” originates in classical scholarship: arithmetic, geometry, music, and astronomy, four foundational disciplines understood as an integrated whole. Here, it alludes to the four mechanical complications that define this timepiece. Bringing together the essence of these iconic creations, 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. It is both a technical and artistic achievement, already earning the affectionate nickname: “Grönefeld’s Greatest Hits.” 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. Following the delivery of the Premiere Edition, a limited series of 28 pieces in platinum is also planned. In a rare preview, the 1941 Quadrivium was presented under strict embargo during Watches and Wonders Geneva to a select group of collectors and members of the press. As the timepiece was completed just one day prior to the exhibition, no official photography was available at that time, and guests were kindly asked not to take photographs. This deliberate decision allowed Grönefeld to offer an exclusive first look while preserving the impact of the official imagery, which will be unveiled during the online press release scheduled for the end of 2026.DESCRIPTION OF THE 1941 QUADRIVIUMThe case follows the 1941 design language (as seen in the Grönograaf)40.0 mm in diameter and 11.3 mm in heightFrosted main dial with hand-bevelled stainless steel elements and polished, multi-faceted white gold hour markersBlued steel handsRaised one-minute flying tourbillon cage at 6 o’clockExposed governor rotating every 7.5 seconds at 9 o’clockLarge central jumping seconds handPower reserve indicator (50 hours) at 10 o’clockHours and minutes displayed at 2 o’clockSapphire exhibition case back revealing the elaborately finished movement and its 473 componentsPremiere Edition of 28 pieces in tantalum, followed by a limited edition of 28 pieces in platinumWith prices of €280,000 in tantalum and €310,000 in platinum (excluding taxes), the 1941 Quadrivium reflects the exceptional craftsmanship and complexity behind its creation.Deliveries of the Premiere Edition are scheduled to commence between late 2026 and early 2027.If this 1941 Quadrivium awakened your interest, please contact Bart and Tim at info@gronefeld.com. Please do not ask for pictures. Pictures will be available at the end of the year.Sourceall newS postsall AwardsBART AND TIM UNVEIL THE 1941 QUADRIVIUMSeven Masterpieces, One Collector's Set: 7 SinsWij zoeken horlogemaker(s)1944 Tanfana. Gracefully Balancing Art and PrecisionWatchmakers Wanted We're hiring!Bart Grönefeld, member of the GHPG 2024Wij zoeken decorateur(s)Grönefeld Moved To A New BuildingWIJ ZOEKEN VAKIDIOTENThe Grönefeld 1941 Principia Preselected at the GPHGWij zoeken decorateur(s) (m/v)Gemotiveerde horlogemaker gevonden!Grönefeld attends the next SIHHWe made it to the finals of the GPHG!Grönefeld is a member of the FHHGrönefeld exhibits at the Watch Fair LuxembourgVideo of the 1941 RemontoireUnique parallax on quill & padCome and visit us in londonParallax Tourbillon nominatedThe renaissance of the Dutch Golden AgeGrönefeld watchmakers since 1912Grönefeld in the news1944 Tanfana awarded Red Carpet Lady’s Watch Proud winner GPHG Award 2022Grönefeld wins Best Men's Watch Prize!Grönefeld wins 2 prizes in Warsaw Poland!Grönefeld wins SIAR prize in MexicoThe 1941 Remontoire wins its first prize!Parallax Tourbillon wins 2014 GPHG !!Timezone Grönefeld Watch of the Year0024 Special Jury Price for Grönefeld One HertzMaking the best watches in the world. We love every aspect of it. Coming up with new ideas together, bringing them to life in a design that captures the imagination, working with infinite patience to achieve perfection: it is a blessing to be able to work together every day with so much pleasure.the horological brothersMaking the best watches in the world. We love every aspect of it. Coming up with new ideas together, bringing them to life in a design that captures the imagination, working with infinite patience to achieve perfection: it is a blessing to be able to work together every day with so much pleasure.the horological brothers