Sorry,

Due to high interest and limited capacity, we will unfortunately not be able to accept orders for the time being. We thank you for your support and understanding.

Our Collection

1944 Tanfana

1969 DeltaWorks

1941 Grönograaf

1941 Principia

Decennium Tourbillon

1941 Remontoire

Bespoke Watches

Parallax Tourbillon

1896 One Hertz

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.

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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.

Proud winner GPHG Award 2022

Great news from Geneva: Bart & Tim Grönefeld were honoured to receive the prestigious GPHG for the 1941 Grönograaf!

Grönefeld wins Best Men's Watch Prize!

Another Grand Prix d’Horlogerie de Genève award :-) The ultimate watchmakers dream.

Grönefeld 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.pl

Oct

2025

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.

Nov

2022

Proud winner GPHG Award 2022

Great news from Geneva: Bart & Tim Grönefeld were honoured to receive the prestigious GPHG for the 1941 Grönograaf!

CRAFTSMANSHIP BY THE HOROLOGICAL BROTHERS

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latest news

Dec

2025

Wij 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!

Oct

2025

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.

Dec

2024

Watchmakers Wanted We're hiring!

Are you a passionate watchmaker? And a driven technician who wants to carry out his/her craftsmanship to perfection? Would you like to work on our exclusive, award-winning watches? And do you share our passion for high-end timepieces? Then we might be looking for you!

Sep

2024

Bart Grönefeld, member of the GHPG 2024

Bart Grönefeld has been asked to be a member of the jury for the Grand Prix d'Horlogerie de Genève 2024. The GPHG can be compared to the Oscars of the film industry. He didn't have to think twice about accepting this opportunity.

Dec

2025

Wij zoeken horlogemaker(s)

Oct

2025

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.

all the news

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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 brothers

Bart 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 brothers