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Desco US NAVY Mark V, Model 1 Diving Helmet

Desco US NAVY Mark V, Model 1 Diving Helmet

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DESCO began production of the U.S. Navy Mark V Diving Helmet in 1942. War contract manufacturers were issued drawings prepared by the U.S. Navy Bureau of Ships. Mark V Helmets produced by the various manufacturers were to adhere to these drawings so parts could be interchanged when necessary. DESCO helmets were and are still made using these drawings and specifications. We still manufacture the helmets as they were originally made. Helmet shells are spun copper, NOT HYDROFORMED, and the breastplates are hand pounded in our original 1940's mandrels, NOT MACHINE STAMPED. These methods give each helmet its hand crafted individuality.


  • Double spring, adjustable tension, automatic exhaust valve with exterior star-wheel, interior chin button, and banana tube to exhaust air to the rear of the helmet.
  • Four impact resistant Acrylic windows. Side windows are circular, upper window is oval, and front window is circular and mounted in a hinged faceplate.
  • Non-return valve with standard submarine threads.
  • Spitcock
  • Telephone cup
  • Transceiver
  • Welding lens bracket
  • Breastplate eyelets for hose and lifeline attachments.
  • Breastplate straps, wingnuts, and washers.
  • Breastplate and faceplate gaskets.
  • Safety lock & chain.
  • Telephone gooseneck with female plug assembly installed.
  • Protective caps for non-return valve and telephone gooseneck.



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