Original U.S. Vietnam War USAF Flight Helmet Oxygen Mask by Sierra Engineering Co. Spanish Militaria (EK Emblem)

(EK Emblem)

was one of the manufacturers of Swords used before and during the Civil War

neck guard apron is batch number stamped 3815

a burning torch was added to the insignia and the present design adopted on 1 July 1884 like the insignia present on the plate

with the correct blue print with black particulars

Original U.S. Vietnam War USAF Flight Helmet Oxygen Mask by Sierra Engineering Co. Spanish Militaria (EK Emblem)Original 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