A collection inspired by the dark side of the moon, this Dark Moon edition features a 41.5mm stainless steel case completely filled with oil to create the illusion of no glass and a strikingly deep dial. The visible air bubble compensates for temperature changes, while the signature left-hand crown and beige Super-LumiNova® details complete its bold and unconventional character.

Case size: 41.5 mm
Case material: Stainless Steel AISI 316L, oil-filled with compensating air bubble
Movement: Swiss Ronda 712.3 Quartz, oil-bath lubricated
Functions: Hours, minutes, screw-down crown
Caseback: Locking Ring System with engraved serial number, quick battery replacement
Dial: Black painted metal with beige Super-LumiNova® hands, numbers, and indexes
Crystal: High-quality curved sapphire
Strap: Black vulcanized rubber, 20/18 mm, quick-release system, personalized with U-Boat logo (ref. 3991/Z), steel tongue buckle (ref. 7019/SHINY/MAT)
Water resistance: 50 m / 5 ATM

Watch Care Instructions:

Clean regularly with a soft, dry cloth.

Avoid contact with chemicals, solvents, or perfumes.

Keep away from extreme temperatures and magnetic fields.

Ensure the crown is fully pushed in or screwed down before exposure to water.

Store in a dry, cool place or in a watch box when not in use.