U.S. ND Mk IV | Gas Mask King

U.S. Navy Diaphragm Mk IV Gas Mask

The U.S. Navy Diaphragm Mk IV Gas Mask was an updated version of the U.S. ND Mk III, but with even larger triangular eyepieces. The filter clipped to the head harness behind the user's head, with two hoses drawing air up towards the eyepieces. This example was made by Mine Safety Appliances in 1945.

Similar masks in my collection: U.S. Army MI-I-5, U.S. NDO Mk I, U.S. ND Mk III, U.S. NORBA Type A-3, U.S. Army M3 Diaphragm

Manufacturer and date stamp on chin of ND Mk IV Gas Mask
"GR-S
MK-IV MSA LOT (?)
7 45

Manufacturer and date stamp on flutter valve of ND Mk IV Gas Mask
"LOT 3 1940 MSA"

Khaki bag for "USN U Gask Mask ND Mark IV"

Gray bag for "USN U Gask Mask ND Mark IV"

Brown bag for "USN U Gask Mask ND Mark IV"

With knitted lens protectors

With cardboard flutter valve protector

With sealed filter

Tag for Navy Diaphragm Mark IV Gas Mask faceform

U.S. Navy Diaphragm Mk IV Gas Mask

Carrier