The pairing of the P-51 airframe and Packard-Merlin V-1650 engine was designated P-51B or P-51C. B (NA-102) being manufactured at Inglewood, Calif., and C (NA-103) at Dallas, Texas. The P-51Bs and Cs started to arrive in England in August and October 1943. The P-51 Mustang remained in service with more than 30 air forces after World War II. The last P-51 was not retired from active service until 1984.