The Mark V diving rig was used by the U.S. Navy for deep sea and salvage diving from 1916 through the early 1980s. Designed for intensive diving operations and to provide maximum physical protection, the Mark V allowed divers to work at much deeper depths than had previously been possible. With its iconic copper helmet, the Mark V is the best known and most recognizable of the Navy’s diving systems.

US Navy Schrader’s & Son helmets are getting harder to find and increasingly more sought after.

Well used and probably still functional.