Vtg 1940s WW2 USN M-422a WWII US NAVY Flight LEATHER Bomber JACKET G-1H&L BLOCK Feb 7, 2020 1940s US Navy (USN) Pilot. MADE BY HIGHLY REGARDED EARLY 1940’s U. This flight jacket was standardized as the M-422 spec. By the US Navy in March of 1940, after which the design went through several s...