No. Model Years Built 400-401 H-15-44 1948 402-411 FP7 1949 425-429 BL2 1948 485-499 RS-3 1951 601-606 TA 1937 621 DL-107 1941 622 DL-105 1940 623 DL-107 1940 624 DL-103 1939 625-626 E3A 1939 627-631 E6A 1940-41 632/632B-634/634B E7AB 1945-46 635-636 E7A 1946 637/637B-642/642B E7AB 1946-48 643-656 E8A 1949-53 675/675B-677/677B F7AB 1949 750-751 AB6 1940 1288-1292 GP7 1952 1294-1299 GP7 1953Locomotives numbered in the 400's were typically used for Chicago area commuter service, prior to 1965 when the first bilevel cars using head end power entered service.
The original Rocket trains were powered by #601-#606. A few early locomotives were were originally assigned to specific trains, described at the Pre War Streamliners page.
#627 was rebuilt into #656.
Some locomotives eventually operated exclusively in commuter service in Chicago. Including having head end power auxiliary generators installed, to operate with bilevel commuter cars.