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.
The Tourbillon category at GPHG 2026 held 19 entries. These are the other 18.
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At this level the question is provenance rather than authenticity. Production is tiny, every watch is accounted for, and the brand can confirm a serial directly.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | What is on the dial side | The chain and fusée and the flying one-minute tourbillon are both presented dial side, with a power-reserve indication. There is no conventional dial covering the movement | A closed dial, or a tourbillon visible only through the caseback, which describes the earlier FB references |
| movement | Balance and frequency | An oversized 11.2mm free-sprung beryllium-copper balance on an overcoil hairspring, running at 3Hz, inside the tourbillon cage | A small balance or a regulator index, neither of which belongs on this calibre |
| case | Case size, material and flanks | 44mm in ethically sourced 18k white gold, 15.46mm high, with plain case flanks | Sapphire windows in the case band. Those belong to earlier Berthoud cases and were dropped here because the movement is already visible from the front |
| movement | Zero-reset seconds | Pulling the crown stops the movement and returns the seconds to zero | A seconds hand that simply stops where it is |
