The 48.8 mm case of the H1 Alumen Blue is dressed in ALUN 316B, a new alloy made from aluminium, magnesium, titanium and zirconium. This alloy gives the shot-peened and satin-finished case, a blue colour that contrasts with the green hour fluid.
The H1 Alumen Blue indicates the retrograde fluid hours, the minutes and the seconds. The minute dial, at the center of the main dial, is also made from ALUN 316B. The small second wheel is at 09:30 and the power indicator at 02:30.
A black rubber strap with a titanium buckle completes the piece. The H1 Alumen Blue is water-resistant to 100 meters.