A2 Flight Leather Aviator Jacket was adopted as standard issue by the U.S. Army Air Corps as the successor to the Type A-1 flying jacket on May 9, 1931. Broadly similar in construction to the A-1, it replaced the A-1 buttoned front and pocket flaps with a zipper and hidden snap fasteners (although the first three A-2 contracts retained the pocket buttons). The A-1 stand-up knitted collar, which buttoned closed, was supplanted in the A-2 by a shirt-style leather collar, with hidden snaps at the points and a hook-and-eye latch at the throat. Stitched-down shoulder straps were also added to the design.
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