Original U.S. Vietnam War USAF Flight Helmet Oxygen Mask by Sierra Engineering Co. 20th Century This is the very best

This is the very best and most complete M2 tripod on the market today

in Aldershot

Israel launched a series of airstrikes against Egyptian airfields

and showing only signs of honest service use

Original U.S. Vietnam War USAF Flight Helmet Oxygen Mask by Sierra Engineering Co. 20th Century This is the very bestOriginal Item. Only One Available. Heres a great piece often missing from Vietnam War flight helmets, the oxygen mask. This mask is in fantastic unissued condition and would pair beautifully with a helmet. The mask retains its original tube without any serious damage. There is a makers tag on the end piece reading: 92114 ASSY 232 94A SIERRA ENG. CO. The rubber mouthpiece is also marked: OXYGEN, MBU 5 P SIZE REGULAR NARROW FSN 1660 794 0855 This is a