Greubel Forsey makes timepieces with multiple tourbillons and inclined balance wheels with the aim of improving timekeeping precision.

In 1987 Greubel moved to Switzerland to join the International Watch Company (IWC), where he helped develop their Grand Complication.

In 1999 both Greubel and Forsey began working independently, and in 2001 they founded together Complitime SA, a company specializing in creating mechanisms with complicated movements for up-market watch brands.

In 1999 Greubel and Forsey began working independently, and in 2001 they founded Complitime SA, a company specializing in creating complicated movements for high end Swiss watch brands.

Greubel Forsey specializes in designing and manufacturing high-end watches that are usually, but not exclusively, based on the Tourbillon escapement, and is reputed for their high level of hand finishing.

[10] [11] Hand Made 1 was awarded the prize for best Men’s Complication Watch at the 2020 Grand Prix d'Horlogerie de Genève.

[18] With its 935 components, the Grande Sonnerie is Greubel Forsey’s most complex watch to date, requiring 11 years of research and development.

[19] The Signature line of watches are developed by one watchmaker who creates their timepiece with the aid, and to the quality standards, of Greubel Forsey.

Art Piece 1[22] features integrated magnifying optics on the side of the case to enable the Willard Wigan micro-sculpture to be viewed.

In 2005, Greubel Forsey launched a proprietary development methodology called EWT (Experimental Watch Technology) to experiment, test and ratify their projects in-house.

[3][23] Inventions in EWT include: Binomial, a mono-material balance-and-spring wheel combination mechanism using isochronically stable materials.

[30] A Greubel Forsey Double Tourbillon 30° Technique won the 2011 International Chronometry Competition held by the Le Locle Museum of Horology.

[31] Hand Made 1 was awarded the prize for best Men’s Complication Watch at the 2020 Grand Prix d'Horlogerie de Genève.

The Double Tourbillon 30° Technique received the 2009 'Grand Complication Watch' prize at the Grand Prix d’Horlogerie de Genève.