The Enola Gay's complete serial number (B-29-45-MO, 45-86292) indicated that it was a B-29 built at the Martin Omaha plant built in block 45, and was ordered in fiscal year 1945.
The Enola Gay was part of a second batch of fifteen improved Silverplate bombers built between February and June 1945. The Enola Gay was built under a program code named 'Silverplate' to produce B-29 bombers specially modified for atomic bombing missions. Last changed 13 January 2007 Enola Gay- The Airplane Model: