Posted By:
brian parkerAt one time I owned a lower grade T206 with a Toy Town Post Office stamp. I have always envisioned that the someone who collected these cards was a retailer and came upon the idea that they could stamp and give the cards out to customers (probably kids) when they bought candy or merchandise as a way to promote sales.
It was something definitely done after the cards were distributed, as the Baseball Bats card will attest, and would tend to support a theory such as mine or Frank's. It shouldn't (but in these back stamp crazy days probably will) make a card any more valuable. I would consider it just like any other backstamped card done by a collector. For example, I have a few cards with 'Gilliam T. Squires" on the back (by the way, this fellow had quite a collection), and although it doesn't bother me, their overall condition should be downgraded because of it.
Brian