Unimatic x Massena Lab U1-MLB

Reference: U1-MLB
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Limited Edition: 200 pieces
Case: stainless steel with unidirectional rotating bezel
Size: 41.5mm
Movement: Seiko NH35 automatic mechanical caliber 
Power Reserve: approximately 41 hours
Dial: black with ivory-colored Super-LumiNova markers
Hands: luminous hands and markers
Water Resistance: 300m
Caseback: solid, engraved with a submarine sonar motif
Strap/Bracelet: rubber

Originally purchased in 2022, this Unimatic x Massena Lab U1-MLB is in excellent overall condition. The watch comes as a full set with its original box and papers. Goldsmith & Complications guarantees the watch’s authenticity. All of our pre-owned watches are covered by the manufacturer’s warranty. Learn more about our pre-owned watches.


The Unimatic x Massena Lab U1-MLB finds inspiration in the iconic dive watches of the past, specifically the 3H "Bund" dive watch issued to the West German Bundeswehr Kampfschwimmers during the 1970s.

Limited to 200 pieces, this watch is the third collaboration released by Unimatic and Massena Lab. It features a 41.5mm stainless steel case fitted with a unidirectional rotating bezel that has a single luminous dot.