B&M No. Model Years Built 1530-1534 RS-2 1949 1550-1553 BL2 1948 1555-1577 GP7 1950-53 3800-3820 E7A 1945-49 3821 E8A 1950 MEC No. Model Years Built 571-580 GP7 1950-52 671AB-672AB F3AB 1947 705-711 E7A 1946-48