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

Rubber stamp
Rubber stamp

Stamp on forehead "USN"

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Rubber stamps
Rubber stamps

Manufacturer and date stamps under chin "65/66/67" "MSA" "HYCAR RUBBER"

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Rubber stamp
Rubber stamp

Date stamp on hose "65/66/67"

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