Original U.S. WWII USN ND Mark IV Diaphragm Gas Mask Converted to Shallow Diving Respirator Spanish Ordnance especially the eye-hole covers

especially the eye-hole covers

minus an inspector’s mark on the back of the swivel

— History of Yuan

) The AC was now in a wind-up tight spiral and came back to the Baltic shore

Original U.S. WWII USN ND Mark IV Diaphragm Gas Mask Converted to Shallow Diving Respirator Spanish Ordnance especially the eye-hole coversOriginal 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