Blancpain Fifty Fathoms 70th Anniversary Act 1 Only Watch

About this reference

The Blancpain Fifty Fathoms 70th Anniversary Act 1, reference 5010-1130-NABA, was released in 2023 as a limited production of 210 units, divided into three series of 70 for different global regions. Collectors prioritize this reference for its 42.3mm stainless steel case, a reduction from the standard 45mm Fifty Fathoms, and its use of the caliber 1315 automatic movement with a five-day power reserve. The dial features a black sunburst finish with vintage-style luminous markers and a sapphire bezel insert. On the secondary market, these watches typically trade between $25,000 and $35,000. While this specific reference was a commercial release, it shares its 42mm architecture with the unique 2023 "Only Watch" edition, which featured a blue dial and sold at auction for 160,000 CHF, signaling high demand for the mid-sized steel case format within the brand's modern catalog.