1c-10c Pan American, Plett Type 4 "SPECIMEN" Black Handstamped Overprint (294S-299S). 21.5mm-high overprints applied diagonally reading from top left to lower right, rich colors, few small faults including 10c small corner crease at top left, Very Fine, these are the only recorded examples of this type of "Specimen" on the Pan-American issue, the overprints were applied by the authorities at Bechuanaland Protectorate, 10c with 2010 P.F. certificate stating in part "privately applied 'Specimen' overprint", this is the same overprint seen on card proofs of the 1869 Pictorials offered in this sale and so the opinion on this certificate needs to be updated to remain consistent with the other more recent opinions, unlisted in Scott

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