Blancpain Fifty Fathoms

The Blancpain Fifty Fathoms, released in 1953, is considered the first "modern" divers' watch, as it was the first to include several now-common innovations like the unidirectional rotating bezel. The modern descendant of that historical model retains much of its classical, straightforward dial and bezel design but upgrades the watch with a sapphire bezel and the automatic, in-house Caliber 1315 caliber. It can also resist water pressures significantly higher than 50 fathoms --- 300 meters, to be precise.