US Navy Mark 12 Diving Helmet Brass Pressure Test Plate

Before Morse could certify a Mark 12 diving helmet ready, it had to be pressure tested. A plate like this would secure to the Mark 12 helmet and then air pressure applied. Brass part weighs approximat

This is an unused new US Navy Mark 12 diving helmet brass base part. The component is in excellent condition and is unstamped. If you have a Mark 12 helmet that has been bent or decommissioned, this i

US Navy Mark 12 diving helmet breech ring. This appears to be a brand new sold brass ring. These are typically always bent on decommissioned Navy helmets. This ring has all the holes drilled and ready

Contemporary made brass diving helmet with ID plate for U.S. Navy Mark V Diving Helmet issued 8/20/41. In good condition but has heavy green patina. Makes a great display piece. Measures 18" tall, 15"

This is an authentic decommissioned US Navy Mark 12 diving helmet. The Mark 12 was the predecessor to the famed Mark V. Made by Morse Diving Equipment, this is a relatively early example from March 19

This is the ring that attaches to the helmets and also the neoprene suit. These rings are commonly bent up on Mark 12 helmets decommissioned by the Navy. This ring is used but still in good condition

This is an original used US Navy Mark 12 diving helmet breech ring. Many of these rings were bent or destroyed when the Navy decommissioned the helmets. This ring is still in good round condition and

Excellent condition restored fiberglass shell for a US Navy Mark 12 diving helmet. It has been re-gel coated with the correct style of yellow paint. Only very minor scuffs from light handling evident.

Very nice original US Navy Mark 12 diving helmet breach ring. This ring retains all the original hardware and has never been bent! All items will be shipped with a signature required upon delivery and

Double sided trifold brochure printed in late 1970s by Morse Diving Equipment. A later Morse sticker was placed on the front circa late 1990s. Piece is in excellent condition with some age on the fron

This is an original fiberglass shell for a US Navy Mark V diving helmet. This shell is not broken or cracked. The gelcoat paint is possibly the original or very old. There are numerous signs of age on

This is an original still in the sealed bag US Navy Mark 12 whip, aka Hose Assembly MIL-H2815/F. The whip was made in 1981 as indicated on the label. Perfect piece for display with your Mark 12 helmet

US Navy Mark 12 diving helmet harness and extras. The main harness is in fair used condition. Also included are extra straps, new old stock clamps, buckles, etc. Total weight is approximately 10 pound

Offered here is a reprint of original 1978 US Navy Navsea operations and maintenance instructions manual housed in 3 ring binder. This is the full and very detailed manual the government used when ser

This is a grouping of four US Navy Mark 12 diving helmet neck dams. One is sealed, the other three are in excellent condition, and appear to be unused. Few of these have survived, especially in this c

This is a double sided trifold brochure printed in the late 1970s by Morse Diving Equipment. A later Morse sticker was placed on the front circa late 1990s. The brochure is in excellent condition. Per

Offered here is a reprint of original 1978 US Navy Navsea operations and maintenance instructions manual housed in 3 ring binder. This is the full and very detailed manual the government used when ser

This is an authentic US Navy Mark 12 diving helmet. Unlike so many examples, this one has NOT had the neck ring bent or decommissioned by the US Navy. The Mark 12 was the predecessor to the famed Mark

This is an authentic green painted US Navy Mark 12 diving helmet. Unlike so many examples, this one has NOT had the neck ring bent or decommissioned by the US Navy. The Mark 12 was the predecessor to

This is an authentic decommissioned US Navy Mark 12 diving helmet. The Mark 12 was the predecessor to the famed Mark V. Made by Morse Diving Equipment, this is a relatively early example from March 19

This is a vintage US Navy Mark V diving helmet tee wrench. This tool is used to secure and remove the wing nuts on the Mark V helmet. Good original used condition, made of brass. All items will be shi

This is an original unused patch made by Morse Diving Equipment. The patch was made in the early 1980s and features the US Navy Mark 12 and Mark V diving helmets. The patch measures 4 inches in diamet

A U.S. NAVY "MARK V" DIVING HELMET, 20TH CENTURY, of copper and brass, the brass plaque in relief marked "U.S. Navy Diving Helmet, Mark V, Morse Diving Equipment Co., Boston, Mass," on custom wooden b

Replica U.S. Navy Mark V copper and brass diving helmet. Includes wooden stand. On the stand, it measures a total of 19" tall x 16" wide and 18" deep. Condition: normal signs of tarnishing to copper a