Transportation & Travel Collectibles

Nautical & Maritime Collectibles

US Navy Mark 12 Diving Helmet Breech Ring First Image

#image-loader-main { display: none; }

US Navy Mark 12 Diving Helmet Breech Ring First Image

US Navy Mark 12 Diving Helmet Breech Ring

Total Sales3 Sold

Median Sale Price

Sale Price Range

Similar Upcoming Sales

LOT OF (9) BRASS RING LAWN SPRINKLERS (1 of 3)

LOT OF (9) BRASS RING LAWN SPRINKLERS

Hartzell's Auction Gallery, Inc.

3 days Left

North African Sword with Scabbard (1 of 18)

North African Sword with Scabbard

Succetti Gallery

3 days Left

LOUIS VUITTON Monogram Eclipse Porte-Clés LV Haro (Halo) Keychain/Key Ring M68853 Wallet (1 of 16)

LOUIS VUITTON Monogram Eclipse Porte-Clés LV Haro (Halo) Keychain/Key Ring M68853 Wallet

7 hrs Left

HERMES RING SILVER SV925 (1 of 2)

HERMES RING SILVER SV925

Feb 14, 2026

Hermes Metal Scarf Ring Silver Lugate Shane Dunkle (1 of 13)

Hermes Metal Scarf Ring Silver Lugate Shane Dunkle

1 day Left

Unknown Training Socket Bayonet With Locking Collar (1 of 3)

Unknown Training Socket Bayonet With Locking Collar

Old Steel Historical Firearms LLC

Vintage modern sterling silver ring (1 of 6)

Vintage modern sterling silver ring

Succetti Gallery

3 days Left

VIKING WARRIOR'S WEDDING RING AS FOUND, 900-1050 AD, SIZE 8 (1 of 4)

VIKING WARRIOR'S WEDDING RING AS FOUND, 900-1050 AD, SIZE 8

Chairish Auctions

42" Circular Advertising Sign Hanging Metal Frame (1 of 6)

42" Circular Advertising Sign Hanging Metal Frame

Donley Auctions

Mar 21, 2026

HERMES RING SILVER SV925 (1 of 2)

HERMES RING SILVER SV925

Feb 13, 2026

HERMÈS CLIC H BANGLE GP SO BLACK (1 of 4)

HERMÈS CLIC H BANGLE GP SO BLACK

Feb 14, 2026

Second-hand Hermès Chaine d'Ancre GM 14 Silver Bracelet (1 of 7)

Second-hand Hermès Chaine d'Ancre GM 14 Silver Bracelet

6 days Left

HERMES RING SILVER AG925 (1 of 2)

HERMES RING SILVER AG925

Feb 14, 2026

Bvlgari Black Leather Choker Necklace with Silver-Tone Clasp (1 of 10)

Bvlgari Black Leather Choker Necklace with Silver-Tone Clasp

Feb 11, 2026

BVLGARI RING K18 WHITE GOLD (1 of 2)

BVLGARI RING K18 WHITE GOLD

Feb 14, 2026

Hoop Earrings Creation, Diamond 6.05Carat 18k W/G Overlay 925 (1 of 5)

Hoop Earrings Creation, Diamond 6.05Carat 18k W/G Overlay 925

M.D.CHJewelry Co.

Feb 27, 2026

Similar Sale History

Unlock All Prices

Sold

US Navy Mark 12 Diving Helmet Breech Ring (1 of 2)

US Navy Mark 12 Diving Helmet Breech Ring 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

Sold

US Navy Mark 12 Diving Helmet Breech Ring (1 of 2)

US Navy Mark 12 Diving Helmet Breech Ring 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

Sold

US Navy Mark 12 Diving Helmet New Brass Breech Ring (1 of 2)

US Navy Mark 12 Diving Helmet New Brass Breech Ring 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

Sold

US Navy Mark 12 Diving Helmet Breach Ring (1 of 2)

US Navy Mark 12 Diving Helmet Breach Ring 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

Sold

US Navy Mark 12 Diving Helmet & Rebreather Tech Maual (1 of 4)

US Navy Mark 12 Diving Helmet & Rebreather Tech Maual 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

Sold

US Navy Mark 12 Diving Helmet & Rebreather Technical Manual (1 of 4)

US Navy Mark 12 Diving Helmet & Rebreather Technical Manual 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

Sold

1979 US Navy Mark 12 Morse Diving Equipment Diving Helmet (1 of 10)

1979 US Navy Mark 12 Morse Diving Equipment Diving Helmet 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

Sold

Green US Navy Mark 12 Morse Diving Equipment Diving Helmet (1 of 9)

Green US Navy Mark 12 Morse Diving Equipment Diving Helmet 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

Sold

Mark 12 USN Diving Helmet & Rebreather Technical Maual (1 of 4)

Mark 12 USN Diving Helmet & Rebreather Technical Maual 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

Sold

US Navy Mark 12 Diving Helmet Morse 1980 (1 of 7)

US Navy Mark 12 Diving Helmet Morse 1980 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

Sold

New Unused US Navy Mark 12 Diving Helmet Brass Base (1 of 3)

New Unused US Navy Mark 12 Diving Helmet Brass Base 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

Sold

US Navy Mark 12 Diving Helmet Restored Shell (1 of 7)

US Navy Mark 12 Diving Helmet Restored Shell 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.

Sold

US Navy Mark 12 Diving Helmet Brass Pressure Test Plate (1 of 3)

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

Sold

Original US Navy Mark 12 Diving Helmet Brochure (1 of 3)

Original US Navy Mark 12 Diving Helmet Brochure 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

Sold

US Navy Mark 12 Diving Helmet Shell (1 of 7)

US Navy Mark 12 Diving Helmet Shell 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

Sold

US Navy Mark 12 Diving Helmet Hose Whip New Old Stock 1981 (1 of 2)

US Navy Mark 12 Diving Helmet Hose Whip New Old Stock 1981 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

Sold

US Navy Mark 12 Diving Helmet Harness & Hardware (1 of 1)

US Navy Mark 12 Diving Helmet Harness & Hardware 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

Sold

US Navy Mark 12 Diving Helmet Neck Dam x 4 (1 of 1)

US Navy Mark 12 Diving Helmet Neck Dam x 4 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

Sold

Original Morse US Navy Mark 12 Diving Helmet Brochure (1 of 3)

Original Morse US Navy Mark 12 Diving Helmet Brochure 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

Sold

Original Morse US Navy Mark 12 Diving Helmet Brochure (1 of 3)

Original Morse US Navy Mark 12 Diving Helmet Brochure 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

Sold

US Navy Mark 12 Morse Diving Equipment Diving Helmet (1 of 6)

US Navy Mark 12 Morse Diving Equipment Diving Helmet 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

Sold

Unused Vintage Morse Diving Equipment Mark V / Mark 12 Patch (1 of 1)

Unused Vintage Morse Diving Equipment Mark V / Mark 12 Patch 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

Sold

United States Navy Mark 12 Diving Helmet – Not Decommissioned (1 of 8)

United States Navy Mark 12 Diving Helmet – Not Decommissioned After the US Navy decided to replace the iconic Mark V helmet, they choose to use the Morse Diving Equipment Mark 12 fiberglass helmet. This model was in use mostly during the 1980s before being repla

Sold

US Navy Mark 12 Divers Coveralls Size 4 (1 of 4)

US Navy Mark 12 Divers Coveralls Size 4 This is an original United States Navy divers coverall for the Mark 12 diving helmet. This one was made by Morse Diving Equipment. It is a size 4, indicated on the tag, and with two yellow fours on ea

TOP