The Blancpain Fifty Fathoms 70th Anniversary Act 3 Ref. 5901 5630 NANA is a distinguished tribute to the historic MIL-SPEC models, honoring the 70-year legacy of the Fifty Fathoms collection. It comes in a 41.3 mm case made from bronze-gold, paired with a striking black dial that features small-part indexes. The watch is powered by an automatic movement and is water-resistant to 30 m. It is fitted with a fabric strap, combining vintage inspiration with contemporary craftsmanship and luxury materials.