1c Black on Salmon Pink, Postal Card, Error of Card Stock Color (UX9d; USPCC unlisted). Mint card, tiny scuff near top likely from the brick that was used to weigh it down during shipment, small stain on back, otherwise Very Fine and rare, with 2005 A.P.S. certificate, the salmon pink stock was used as protective sheets on top of stacks of normal buff card sheets during transport from the Wilkinson Paper Mills, they were weighed down with bricks and were intended to be returned for use in later shipments, some were accidentally printed and found their way into the hands of collectors, unpriced in USPCC which footnotes these as "counting markers", though we are informed that this information will be corrected in future editions

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