Variation A: Sheet metal chassis is painted BLACK, heat-stamped WHITE lettering, with bar-end trucks.
Variation B: Sheet metal chassis is painted BLACK, rubber-stamped WHITE lettering, with AAR trucks.
Variation C: Sheet metal chassis is chemically blackened that has WHITE rubber-stamped serif "LIONEL" lettering.
Variation D: Cab is painted RED with AAR trucks. Most of this variation have one solid and one operating disc coupler. 1964 production.
Variation E: Sheet metal chassis is chemically blackened with no lettering and AAR trucks, cab plate that is heat-stamped "BUILT BY / LIONEL" and has a painted RED cab. Early 1966 production.