Diving helmet - Full size 18" deluxe U.S. "Mark V" Deep Sea Divers Helmet - Steel

The U.S. "Mark V" deep sea diving helmet is an iconic piece of underwater exploration and commercial diving history. Manufactured predominantly from the early 20th century, this full-size 18-inch deluxe steel model represents the type of heavy, robust helmet used by divers for deep sea operations, salvage, and underwater construction. Its design features a solid steel shell with multiple glass viewports and air supply fittings, connected to a heavy, watertight diving suit. The Mark V helmet is renowned for its durability, engineering excellence, and historical significance as standard gear in the United States Navy and commercial diving sectors. Today, these helmets are coveted by collectors, maritime museums, and diving enthusiasts as tangible artifacts of underwater technological development and adventure. Such helmets also illustrate the evolution of diving safety and technology, making them fascinating historical collector's pieces beyond their original practical purpose.