90th Bombardment Wing Boeing B-29-100-BW Superfortress 45-21846.  Was converted to an F-13 Photo-Reconnaissance aircraft, re-designated RB-29 in  1948
United States Air Force
1948
Birdsall, Stephen (1980), Superfortress, the Boeing B-29 - Aircraft Specials series, Squadron/Signal Publications; 1st edition, ISBN-10: 0897471040, Image source listed as United States Air Force