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U-42 Black 53mm Ref. 6157

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Every U-Boat timepiece is individually handcrafted in Italy by master watchmakers, dedicated to the highest level of precision engineering and finishing, where care and attention to details is evident throughout the entire process. From the manufacturing to the final assembly of the watch. The U-Boat U-42 is Limited to only 999pcs worldwide.

The U-Boat U42 Black automatic's back case is fixed on case with 6 encapsulated hexagon screws. Watertight on axis reset and assured charge by PTFE gasket Bi-directional rotating bezel lockable with a lever on the right side of the case. Fixing of revolving bezel by 3 screws encapsulated in the back case; the bezel removing, for maintenance and washing obtained by removing the three screws, does not affect the watch watertight.

The U-Boat U-42 features a Swiss Made U-Boat U-28 automatic movement with U-Boat specified special crown positioned at 9 o'clock. The winding crown was built in 2 parts. One is attached to the movement stem whiles the other is hinged to it with a pivot. This gives a flexible joint configuration which allows the crown to protrude cosiderably from the watch itself for winding and setting, yet returning it to a protected hidden position - diminishing the side clutter when in action.  This type of crown is imperative under certain conditions as it is absolutely necessary for activites during which gloves are required such as underwater operations and environmental practice at Artic temperature.

The 47mm Grade 5 Titanium case is hand finished.  The trade mark protected special protective device at 9 is unique and eye catching. Making it an instant statement on the wrist. High quality scratch resistant sapphire crystal tops it up.

The U-Boat U-42 comes with a hand made and hand finished calf leather strap. With a special U-Boat dual tang titanium buckle.

All U-Boat watches come with the U-Boat leather box, manual and warranty card. And a 2 years warranty.




U-Boat calibre U-28 with U-Boat specifications for crown to be at 9 o'clock


Black with 12,4,8 and hour markers. Multi layered dial.


Vintage SuperLuminova.


Matte Grade 5 Titanium. Serial numbered.

Case Back

Matte Titanium


Bi-directional with lockable function using lever


Distinguished hinged crown on left side with lock




High quality sapphire


Handmade and hand finished calf leather strap. Dual tang titanium buckle.

Water resistance



53mm in diameter, 18.4mm thick

Power Reserve

~42 hours


Guaranteed 2 years

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