Original Cold War U.S. Air Force Selby Shoe Co. P-4A Flying Helmet - Dated 1957 Russian Flare Guns and began manufacturing pocket knives

and began manufacturing pocket knives with the "Two Devils" logo on them

It shows signs of real use in the field

It was the canonical tachometric design

but is is not clear

Original Cold War U.S. Air Force Selby Shoe Co. P-4A Flying Helmet - Dated 1957 Russian Flare Guns and began manufacturing pocket knivesOriginal Items: Only One Available. This is a very good condition complete 1957 dated U. S. Air Force size large Selby Shoe Company P 4A flight helmet that comes complete with internal web liner and pull down spring loaded tint visor. All parts are in very good condition. The USAF P 4 flight helmet was standardized in 1955 as a continuation of P 3 with improved avionics in order to make helmet headset communications and oxygen mask dynamic microphone