Blancpain's contribution to this year's Only Watch auction comes in the form of a throwback to the Fifty Fathoms Barakuda, which has its hands and markers updated in blue Super-LumiNova. Originally produced for technical diving equipment company, Barakuda, the one-off watch features a 40mm stainless steel case with a unidirectional rotating bezel and an 1151 automatic movement with a 100-hour power reserve. The watch also features a rotor engraved with "Only Watch," 300m water resistance, and a tropical rubber strap. 

The Black Bay One will go on sale on November 9th at the Only Watch auction in Geneva, Switzerland.

$13,000-$20,000 (est.), onlywatch.com