Case size: 46.5 mm
Case material: Stainless Steel AISI 316L with PVD treatment, oil-filled with compensating air bubble
Movement: Swiss Ronda 762 Quartz, oil-bath lubricated
Functions: Hours, minutes, screw-down crown
Back: Locking Ring System, engraved serial number, quick battery replacement
Dial: Blue metal with brushed soleil finishing, beige Super-LumiNova® hands and indexes
Crystal: Domed sapphire
Strap: Black vulcanized rubber, 22/20 mm, quick-release system, personalized with U-Boat logo, steel tongue buckle (ref. 3990/Z, buckle ref. 5466/SCREW)
Water resistance: 50 m / 5 ATM

Powered by a Swiss Ronda quartz movement lubricated in an oil bath, this timepiece delivers precision and durability. The innovative Locking Ring System ensures quick battery replacement, while beige Super-LumiNova® enhances legibility. The domed sapphire crystal and ultra-resistant vulcanized rubber strap complete its rugged yet refined character.

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.