12c Plum on Cream entire, Die 66, Centennial Special Printing (U197 var; USPSS 596). Size 25, knife 122, watermark 2, unused, slight envelope bluing, still Very Fine, the Centennial Special Printing entires in the large size 25 envelopes are particularly rare, the UPSS Catalog states less than six sets of these are reported to exist (Nos. 596 offered here, 603a, 609, 618 and 636), signed Maisel, UPSS value

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