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Posted By: Dan Kravitz

Why would a store or a factory develop a stamp, and stamp it on 20 cards? It doesn't make sense. They would stamp every card including other issues. Does anyone know when the first sighting of an OP stamp was? Is it possible that sometime in the 50's the stamp was applied? Maybe a guy, for some strange reason, who had a handful of e98's and an old stamper defaced his cards. I would think if it were being done by a company or business there would be more examples around.