Manufactured by Bell-Atlanta.
Information from Johan Visschedijk on Bell-Atlanta's production of B-29s
Bell-Atlanta delivered 669 aircraft: 310 B-29Bs, 358 B-29s, and a single XB-29G modified from an additional B-29B. At the end of the war four unfinished aircraft were cancelled and scrapped: three B-29-65-BAs and one B-29B-65-BA.
Aeroplane Photo Supply No. 4087