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This Paraguay stamp, #562, features a double overprint with one of the overprints being upside…
Inverted Overprint Paraguay Stamp (PA115) - Mint Never Hinged, Very Fine Quality
This stamp from Bhutan is a rare and unique find for collectors of stamp errors and oddities. …
Inverted Overprint Airmail Stamp with Helicopter Design from Bhutan
This rare United States stamp features a black omission on two panes of four, making it a uniq…
Rare Find: United States Stamp with Black Omission on Two Panes
Imperfect Treasures of United States Stamps is a unique product that showcases the errors, fre…
Imperfect Treasures of United States Stamps
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