Closeup of the dive breaks on a Douglas XBT2D-1 <i>Skyraider</i> in 1946. The <i>Skyraider</i> would soon be redesignated "AD", and finally to "A-1" in 1962.
USN
1946
U.S. Navy Naval Aviation News October 1946 <a rel="nofollow" class="external autonumber" href="http://www.history.navy.mil/nan/backissues/1940s/1946/oct46.pdf">[1]</a>