US AIR FORCE “NOS” 1960/70’S ERA? SMOKED GLASS JET HELMET EYESHIELD, HM’ED “11-20% P/N 570-406 (?)”, MFGERED BY “SIERRA”

US VIETNAM WAR HAND HELD PILOTS, LRRP AND SPECIAL FORCES SMALLER 6 1/2″ X 3 1/2″ X 2″ “RT-10 RADIO”, REF 64/157, TYPE “RECEIVER – TRANSMITTER RADIO, TYPE AR-10”, EXCELLENT PLUS OVERALL CONDITION AND C/W BATTERY