Mask, Oxygen, Type MS-22001. Size small. Developed from the WW2 A-13A, this pressure demand oxygen mask probably dates from the early 1950s and is fitted with a webbing harness and green plastic exoskeleton. The rubber is generally in very good pliable condition but there is some cracking/crazing evident when the mask is flexed. Note that the cheek flanges have not been custom trimmed and remain 'as issued'. Very good harness but there is some surface corrosion of metal parts. The oxygen hose is also very good and fitted with a British type 191A2 connector. Unwired. Stock code O26125.