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1944 Tanfana
1944 Tanfana
1969 DeltaWorks
1969 DeltaWorks
1941 Decennium Tourbillon
1941 Decennium Tourbillon
1941 Grönograaf
1941 Grönograaf
1941 Principia Automatic
1941 Principia Automatic
1941 Remontoire Constant Force
1941 Remontoire Constant Force
1941 Remontoire Bespoke Series
1941 Remontoire Bespoke Series
Parallax Tourbillon
Parallax Tourbillon
One Hertz Jumping Seconds
One Hertz Jumping Seconds
One Hertz Techniek
One Hertz Techniek
One Hertz Contemporary
One Hertz Contemporary
One Hertz Classic
One Hertz Classic
GTM-06 Tourbillon Minute Repeater
GTM-06 Tourbillon Minute Repeater
Bart & Tim Grönefeld
Bart & Tim Grönefeld
Our workshop
Our workshop
Grönefeld Brand
Grönefeld Brand

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

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