Envelope number
I recall from the Old Cardboard article that the envelopes that contained these cards had a number printed below the address that was thought to indicate how many cards were in the envelope. I noticed though that the most recent eBay auction with four Cleveland cards came in an envelope with the number two printed on it.
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Jason
Last edited by JLange; 11-06-2016 at 04:09 PM.
Reason: Grammar
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