318th Fighter-All Weather Squadron Northrop P-61B-20-NO Black Widow 43-8293 1947 Hamilton Field CA.  One of Air Defense Command's first interceptor aircraft.
United States Air Force
1947
Powers and Menard (2006) Buzz Numbers: The Explanations and Regulations Behind America's Military Aircraft Identification System, Specialty Press ISBN: 1580071031  Image source listed as United States Air Force