hours, minutes, small seconds, 60-minute unidirectional flange
Calibre A-300
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46.00 mm, grade 5 titanium
Lacquered in green, indices coated with Super-LumiNova
rubber, green (+ complimentary NATO strap in green, hand-stitched), grade 5 titanium pin buckle
Water resistance
300 meters
Limited edition
25 pieces
U53 Diver Tourbillon

U53 meets all the criteria for watches intended for underwater use. Its case is water-resistant to 300 metres. Its 60 minute-graduated rotating flange only turns anticlockwise. Its hands and indices are luminescent. It is equipped with a helium valve, to allow saturation diving. It is also resistant to magnetic fields and scratching: indeed, U53 is made entirely of grade 5 titanium, a light, comfortable metal which is very well tolerated by the skin even in high moisture conditions yet is hard enough to withstand most scratches.

U53 also stands out among classic types of diver by showcasing its movement in spectacular fashion. The Angelus A-300 is a skeleton calibre characterised by its large bridges. By their openwork in the centre, which specifically evokes the design of Angelus’ calibres. By its one-minute flying tourbillon, with its contemporary technicity, and by the slightly asymmetric placement of all its vital components: the barrel at 1 o’clock, winding at 4 o’clock, tourbillon at 6.30, small seconds at 9.30. These unusual locations are dictated by the design of the U53.