Released in 1953 as one of the earliest modern dive watches, the Blancpain Fifty Fathoms has come to define the dive watch niche of the horology industry. Since its inception, it has featured on the wrists of commercial divers, the military, and enthusiasts alike. With its proven track record, Blancpain has decided to use the Fifty Fathoms Bathyscaphe collection as a means to raise awareness and funds for ocean protection. Released as a limited edition of 250 pieces, the ref. 5200-0204-52A features a 43.6mm grey satin brushed ceramic case with a blue dial and matching blue ceramic bezel to evoke the sea's dark tonal blue hue and deep depths. Powered by the 5Hz automatic cal. F385 movement features a 50-hour power reserve and a signed winding rotor that reminds the owner of the timepiece's raison d’être.