U.S. Navy Diaphragm Mk III Gas Mask
The U.S. Navy Diaphragm Optical Mk III Gas Mask used the same rubber faceblank as the U.S. NDO Mk I, but with bigger, wider, curved eyepieces for an increased field of vision. 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 1944.
Manufacturer and date stamp on chin of ND Mk III "5 44 MSA LOT (?) GR-M"
Manufacturer and date stamp on flutter valve of ND Mk III "LOT 3 1944 MSA"
Bag for "USN U Gas Mask ND Mark III"