PTC Ticket Puncher?

At a train show over the weekend I purchased a ticket puncher - one side of the punch has PTC stamped on it, the other side has Meith Mfg. with a New Jersey address, I have several questions about it. Obviously, I assume PTC is for Philadelphia Transportation Co., were there any other PTCs somewhere else? Did this see service into SEPTA operations? Other than for nostalgia, is it an item worth anything monetarily? I have not been able to find a matching one using google search or ebay as of yet, is there a book that I can reference that might help? Thanks!

-Ed

Just for the record, there was a Portland Transit (or Traction?) Co. operating between Portland and Oregon City in the 1950s, but I don't think they issued transfers, and in any case the Philadelphia Transportation Co. seems like the best bet, especially since the manufacturer was in New Jersey.

Meith is still around.
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