Original U.S. WWII USN ND Mark IV Diaphragm Gas Mask Converted to Shallow Diving Respirator Medals and other parts of the

and other parts of the stock show some lovely hand carving

There was not a date that we could see

but over the years the rubber cement has let go

none of which interfere with sheathing the blade

982 and the interior

Original U.S. WWII USN ND Mark IV Diaphragm Gas Mask Converted to Shallow Diving Respirator Medals and other parts of theOriginal Item. One of a Kind. This is a very interesting example of the U. S. Navy Diaphragm Mk IV Gas Mask, which has the canister entirely removed with a new tube and valve attached for attachment to an oxygen tank. Additionally, the vent on the front has been entirely closed off, so that the mask could be used for shallow diving and likely ship repair. The U. S. Navy Diaphragm Mk IV Gas Mask was an updated version of the U. S. ND Mk III, but with