Case size: 46.5 mm
Case material: Stainless Steel AISI 316L, 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: Green metal with brushed soleil finishing, beige Super-LumiNova® hands and indexes
Crystal: Domed sapphire
Strap: Black vulcanized rubber, 22/20 mm, quick-release, personalized with U-Boat logo, steel tongue buckle (ref. 3990/Z, buckle ref. 5466/SCREW)
Water resistance: 50 m / 5 ATM

Equipped with a Swiss Ronda quartz movement lubricated in an oil bath, this watch offers uncompromising precision and durability. The innovative Locking Ring System allows quick battery replacement, while beige Super-LumiNova® enhances readability in all light conditions. A domed sapphire crystal protects the dial, paired with a robust black vulcanized rubber strap for all-day comfort.

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.