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

Equipped with a Swiss Ronda quartz movement lubricated in an oil bath, the Dark Moon delivers precision with a distinctive visual effect. The innovative Locking Ring System allows quick battery replacement, and the curved sapphire crystal ensures durability and clarity. A vulcanized rubber strap with an easy quick-release system enhances comfort and versatility.

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.