- GPHG 2020WinnerPrix de la Complication pour Homme
Entry to the Grand Prix d'Horlogerie de Genève is voluntary and made by the brand. An entry is a watch registered for that year's competition, not a jury verdict, and several large houses including Rolex, Patek Philippe and Omega do not take part at all.
What it was up against
Complication pour Homme, GPHG 2020
The Complication pour Homme category at GPHG 2020 held 19 entries. These are the other 18.
- Andersen Genève Tempus Terrae diamants baguette
- Arnold & Son Globetrotter Nuit
- Bovet 1822 Récital 27
- Breitling AVI Ref. 765 1953 Re-Edition
- Charles Girardier Tourbillon Signature Mystérieuse chevrons
- De Bethune DB28XP Tourbillon
- Girard-Perregaux Quasar Light
- Hermès Slim d'Hermès GMT
- HYT H5
- IWC Schaffhausen Portugieser Calendrier Perpétuel 42
- Jacob & Co Astronomia Revolution
- Konstantin Chaykin Mars Conqueror Mk 3 Fighter
- Louis Vuitton Escale Spin Time Météorite
- Mauron Musy GMT Sport
- MB&F HM10 Bulldog Ti
- Moonyang King Arthur
- Piaget Piaget Polo Emperador Tourbillon Haute Joaillerie
- Timing Ether-22
Filter the full GPHG field for Complication pour Homme, 2020
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Authentication
The hand-drawn hairspring must show irregular natural geometry under magnification; machine-regular geometry means the hairspring has been replaced.
- Only a handful of Hand Made 1 pieces exist; any purchase requires direct verification with Greubel Forsey.
- The hairspring is hand-drawn; its geometry will appear naturally irregular, not machine-uniform.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| movement | Hand-drawn hairspring geometry | Hairspring geometry shows natural hand-work irregularity visible under loupe | Machine-regular hairspring geometry; replacement or non-genuine hairspring |
| movement | Overall hand-built finishing | Approximately 95% of components hand-built; consistent with Hand Made 1 documentation | Machine-finished components inconsistent with the hand-built standard |
| caseback | Movement access for hairspring inspection | Hairspring visible and accessible for geometry inspection | Hairspring obscured or inaccessible for verification |
- No replacements; Hand Made 1 components are unique and irreplaceable.
Authentication guide
The Hand Made 1 is built using only traditional pre-industrial tools; no CNC machining. Authentication at this level is provenance-based. The movement finishing under loupe reveals hand-tool marks that are fundamentally different in character from machine-finished bridges.






