Enlargement of U.S. Army Air Force (USAAF) serial number stencil on P-38F "Thumper" 42-12644 At the lower left is the U.S. Army Air Force serial number stencil with "P-38F-5-LO" and [Serial Number] 42-12644". Credit: Norman Brown via AWM 014628 Date: circa March 3, 1943–July 17, 1943
B&W Enlargement