Original U.S. Navy Vietnam War Era Type A3 Oxygen Breathing Apparatus Set in Transit Chest DVD The exterior of this officer

The exterior of this officer tunic is clean and showing only minor staining and some period repairs

a definitely sign it is for fire brigade use

but somebody managed to take one apart once to see how it was assembled

but after 1940 this more ornate buckle was used

with some small scratched areas and overall wear

Original U.S. Navy Vietnam War Era Type A3 Oxygen Breathing Apparatus Set in Transit Chest DVD The exterior of this officerOriginal Items: Only One Set Available. In 1953, the Type A 3 OBA began to replace the Type A 2 OBA. It was a closed circuit, self contained gadget. Oxygen generated by chemicals in a canister could be inhaled for around 60 minutes, the effective time limit of the oxygen supply, independent of the surrounding atmosphere. Head straps, a set of plastic eyepieces, a speaking diaphragm, and a rubber mouthpiece were all included with the Type A 3 OBA's