Original Items: Only One Available. This is an excellent condition 1957-1959 U.S. Air Force size large P-4 flight helmet that comes complete with its pull down spring loaded tint visor. This helmet does have the plug on the left side for the mask microphone and ear receivers with cord. Inside there is a complete liner with original data tag manufactured by the Shelby Shoe Company. Overall condition is very good.

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 compatible with aircraft intercommunication set AN AIC-10. the new H-75/AIC headset system was added as well as a new earphone cushions spring mounted and tethered to short nylon strings which protruded through the lateral helmet walls to be secured over a rubber over a rubber lock-nut and snubber bar. The P-4 was used with A-13A/MS22001 A-14 oxygen mask.