The Bulkhead Pipe Car No. 6477 was produced during the years 1957 and 1958. Early issues would have bar-end trucks usually with tabbed couplers. Later issues had AAR trucks with disc couplers. Collectors should be aware that the "Liquefied Gases" cylinder is sometimes substituted on this car. This cylinder is properly used only on No. 6469. There are three variations:
Variation A: Has bar-end trucks with the number to the right of "LIONEL". Found both with and without tabbed couplers.
Variation B: Has AAR trucks with the number to the right of "LIONEL".
Variation C: Has AAR trucks with the number to the left of "LIONEL".