An encounter between Fine Watchmaking and fluid mechanics. One might say a utopia. Shattering all certainties, steamrollering conformity, the idea that led to the H1 was simple and consisted of two flexible reservoirs fixed to each end of a capillary. In one was an aqueous liquid filled with fluorescein, and in the other, a transparent viscous liquid. To keep them separate : the repulsive force of the molecules in each liquid, with a meniscus to mark the boundary between the two. As the hours go by, the fluorescent liquid advances.

The meniscus, in the shape of a half moon, marks the breaking point with the other fluid in the tube, indicating the time. At 18:00, the fluorescent liquid comes back to its original position, going backwards. The secret that gets the reservoirs going ? Two bellows made of a highly resistant, flexible electro-deposited alloy, each driven by a piston. And this is where watchmaking comes in to activate the system.

Case :

titanium and pink gold (5N) with brushed, micro-blasted and polished finishes

  • Diameter: 48.8 mm
  • Height: 17.9 mm
  • Black rubber coated screw-down crown
  • Titanium dome at 6 o’clock
  • Cambered sapphire crystal with anti-reflective coating on the dial side
  • Screwed sapphire back
  • Water resistant to 100 metres

Functions :

Retrograde blue fluid hours; minutes; seconds

Movement :

Mechanical with manual winding, exclusive HYT calibre

  • 28,800 vib/h, 4 Hz, 35 jewels
  • Bridges hand-chamfered and adorned with Côtes de Genève, rhodium plated bellows
  • 65-hour power reserve

Dial :

Unstructured, fluid hours

  • Grey anthracite hour dial, white indexes and black numerals
  • Blue minute dial, pink gold (5N) indexes and numerals, pink gold (5N) minute hand
  • Uminescent minute hand and hour-markers
  • Regulator at 12:00
  • Small seconds wheel at 09:30
  • Power-reserve indicator at 02:30

Strap :

Grey leather alligator, titanium deployant buckle



Limited edition of 50 pieces


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