Why is there an X in the part number? Nothing appears to be unusual about the car and Lionel usually added that X for something special.
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In this instance, I think Lionel was trying to give the car a 'railroadie' type number. In the real railroad world X stands for 'extra' All early short boxcars have the X as a prefix also. (X2454, X6454) Lionel seems to have stopped the X prefix around the time the 6464 series started. Lionel used a X as a suffix on the original box sometimes if the item was different or as a component of a packaged set.
Thanks for the reply. This will probably come up in one of the publications next year in the subject of Lionel's transition from prewar to postwar, and this is a question a friend of mine had who is big in prewar Lionel.
