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U.S. NORBA Type A-3

The U.S. Navy Oxygen Rescue Breathing Apparatus Type A-3 used a facepiece very similar to the U.S. ND Mk IV made of black Hycar rubber.  When connected to a rebreather system, it was suitable for use in smoke and other environments lacking sufficient oxygen.  This example was made by Mine Safety Appliances in 1966.


Similar masks in my collection:  U.S. ND Mk IV, U.S. Army M3 Diaphragm

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