H1 SAND BARTH

Sand of St Barth polyepoxyde* with brushed, shot-peened and satin-finished surfaces.

01 / Front view

St Barthélemy, or a parallel, private universe, where you can experience this barefoot and low key vibe,
what the French call décontracté. Parfait, non?
HYT developed an exclusive manner in which to carry a small part of the world’s most beautiful beach
all year round. Just a few grains of sand from the Anse du Gouverneur were enough to be injected
in the case of this limited edition of 25 pieces.
The unique resin case composition also called polyepoxyde, brings an element of lightness to
the watch with ground-breaking properties : 7 times lighter than stainless steel, 4 times lighter than titanium
but 3 times more resistant.
Two straps are available and allow you swap-up your style depending on your mood or the occasion :
-  sporty chic mood with white rubber, or
-  ready for a fancier cocktail with the black rubberized alligator with blue stitching. 

An encounter between Fine Watchmaking and fluid mechanics.

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.

The two reservoirs at 06:00.
While the first compresses,
the second expands,
and the other way round,
resulting in the movement
of the liquid in the capillary.


The Principe

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.

A MECHANICAL MOVEMENT

TO ACTIVATE THE HYDRO SYSTEM

Orchestrated by Jean-François Mojon and his Chronode SA team, a mechanical movement is situated in the upper part of the watch, and propels a cam, which pushes the piston and activates the bellows.

The main challenge lay in finding an interface between the mechanical movement and the hydro system in a closed, waterproof circuit - a task further complicated by the limited space available to house them both. They had to be assembled separately to keep them independent, and then made to operate simultaneously. This is a highly delicate modular integration, which involves other constraints, such as the installation of the dial in two parts, through the sides.

DISCOVER INSIDE HYT

TECHNICAL

DATA

Case

Sand of St Barth polyepoxyde* with brushed, shot-peened and sating-finished surfaces

- Diameter: 48.8 mm

- Thickness: 17.9 mm

- Rubber-clad screw-lock crown

- Crown guard

- Screw-locked added lugs

- Titanium dome at 06:00

- Cambered sapphire crystal glass with anti-reflective coating on the inside

- Screw-down sapphire back

- Water-resistant to 30 meters

 

* Sand of St Barth polyepoxyde:

Firmness : 

- Polyepoxyde : 700 vickers

- Steel 20 AP: 860 vickers

- Titanium : 250 vickers 

 

Density :

Polyepoxyde : 1.1g/cm3

Steel 20 AP : 7.8 g/cm3

 Titanium : 4.51g/cm3

Movement

Mechanical hand-wound, exclusive HYT calibre

- 28,800 vph, 4 Hz, 35 jewels

- Bridges hand-chamfered and adorned with Côtes de Genève, rhodiumed bellows

- 65-hour power reserve.

 

Dial

Unstructured, fluid jours

- Sand brown hour dial, white indexes and numerals

- Sand brown minute dial, grey indexes and numerals, grey minute hand 

- Luminescent hand and hour-markers

- Regulator at 12:00

- Small seconds wheel at 09:30

- Power reserve indicator at 02:30

Functions

Retrograde fluid hours, minutes, seconds.

Ref

148-NS-11-BF-RB 

Limited serie of 25 pieces

Strap

- Black rubberized alligator with a blue sticking, titanium deployant buckle

- White rubber, titanium deployant buckle 

 

Inside

Hyt


Bellows

The secret force driving the reservoirs is 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.

Discover inside HYT Discover inside HYT