Original U.S. WWII USN ND Mark IV Diaphragm Gas Mask Converted to Shallow Diving Respirator Spanish Ordnance about 100km from Perm in

about 100km from Perm in the western foothills of the Ural Mountains

The photograph measures 5" x 7"

especially the eye-hole covers

This later version has the Heer / Army eagle at the top of an oak leaf wreath

The left side of the frame is marked CALIBRE / WINCHESTER next to 1873 under the cylinder

Original U.S. WWII USN ND Mark IV Diaphragm Gas Mask Converted to Shallow Diving Respirator Spanish Ordnance about 100km from Perm inOriginal 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