Recall MTH using Lionel stock numbers for its products (#151 semaphore and the like), where Lionel had no copyright safeguards. By stamping the stock numbers everywhere, Lionel may be, coupled with other internal procedures they are not telling us, exercising strict control, to avoid a repeat of re-using product#'s Lionel has marketed. Post-War #'s are glaring examples, but perhaps the old saying "once burned, twice cautious" applies.
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