New HYT: H4 with new colours and mechanical LED light

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We covered the H4 when it was launched. Here is our detailed review of the ingenious LED light technology used. Now, the H4 is released in 4 new fluid colours – red, blue, green and a special green-yellow. 


Multicolour Ref.: 512-TD-66-GF-RN; Limited edition of 15 pieces



Enlightened. Energized. Polarized.

Dissolving apparent contradictions drives HYT. The latest H4 watches shed even more light on this intrinsic fascination with making the paradoxical meaningful. These colorful new timepieces remain loyal to the brand’s fil rouge of showcasing the power of the past and future to assign the present context and content. At the same time, they add a striking new dimension to the combined energy of two potentially polemic opposites – light and liquid – with the smallest dynamo ever invented, patent pending.


Green Ref.: 512-TD-69-GF-RN; Limited edition of 50 pieces

HYT brings together horology with fluidics by visualizing time’s passage with immiscible liquids. The H4 builds on this foundation to explore the tension between day and night, mindful that time’s flow never sleeps. Illumination comes from the first mechanical source ever designed for an haute horlogerie complication. The exploration of new territories in miniaturization and component curvature enabled the in-house development of a micro-generator. This sources light from two LEDs without any support from electronics or batteries.


HYT H4 Alinghi with the LEDs activated, in the dark. The white light bathes the entire movement and the time can be read clearly. Not something which is easily done in the dark with the H1 as the liquid does not take to addition of a luminous substance.
Note the light spill from the LEDs, creating a beautiful background for the watch. Very cool.


Bauhaus boldness enlivens a canvas of black and silver metal components in four eye-catching H4 limited editions. Three focus on red, green and blue respectively. A fourth family member adds a touch of yellow to these in a stunning multicolored statement. As the fluorescent nano-particles in the transparent composite dials catch the light, each of the surface’s tiny perforations transforms into a light source in itself. Adding its signature to the paradoxical perfection of these timepieces is the seamless combination of an exclusive mechanical movement and patented fluidic module. Even the bi-material strap in rubber and technical fabric shows that opposites attract, act and interact.


Red Ref.: 512-TD-68-RF-RN; Limited edition of 50 pieces



HYT H4 Specifications


HYT H4 Blue 512-TD-67-BF-RN; Limited edition of 50 pieces


Multicolour Ref.: 512-TD-66-GF-RN; Limited edition of 15 pieces

Green Ref.: 512-TD-69-GF-RN; Limited edition of 50 pieces

Red Ref.: 512-TD-68-RF-RN; Limited edition of 50 pieces

Blue Ref.: 512-TD-67-BF-RN; Limited edition of 50 pieces

Green, Red, Blue or fluidic hours
Minutes, seconds, power reserve
Titanium, black DLC coating, micro-blasted and satin-finished
Diameter: 51 mm
Height: 17.9 mm
Titanium screw-down crown, black DLC coating
Titanium push-button crown, black DLC coating
Titanium dome, black DLC coating
Domed sapphire crystal with anti-reflective coating
Screwed case back, sapphire crystal
Water-resistant to 50 meters
HYT’s exclusive patented micro-fluidic module:
Borosilicate glass capillary tube, nano-coating interior
Multi-layer metal bellows
Two immiscible liquids; one transparent, the other one colored with a highly resistant dye
Thermal compensator with dedicated bellow and specific liquid
High-tech ceramic fluidic restrictors
Mechanical with manual winding, exclusive HYT caliber
28,800 Vph, 4 Hz, 35 jewels
Beveled bridges adorned with Côtes de Genève decorations
65-hour power reserve
Transmission between movement and fluidic module by conversion of rotation into linear movement using a cam-follower system
Isostatic connection of the fluidic system guaranteed by a trident
Purple light mechanical module:
Winding function using the push-button crown
Light activated by pressing the push-button crown
Dial lit by two LEDs located under the dome and powered directly by a micro-generator
Rhodium-plated and sand-blasted hours flange with white numerals
Transparent composite dials loaded with fluorescent nanoparticles, green, blue and red indexes and numerals
Yellow, green, or blue minute hand, white Super-LumiNova®
Bracelet: Black technical fabric with grey top-stitching, titanium folding buckle, black DLC coating



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  1. The hyt models are very beautiful of the optics, own a H1 colors and can be of any interest to anyone who is interested in hydrocartridge My now is now the 3mal already in repair and I have mine since Feb. and the sevice is so bad I have not had from any manufacturer until now