15c Blue, Special Printing Without "Sample A" Ovpt. (189S-L var). Block of four, original gum, h.r. at top, pre-printing paper folds, Very Fine, the 1889 "Sample" and "Sample A" overprinted stamps are referred to as "Special Printings" in the Scott U.S. Specialized Catalogue, and the "Sample A" colors are essentially the ones adopted for the subsequent 1890-93 Small Bank Note Issue, the overprint omitted variety offered here is scarcer than the overprinted stamp, Scott value as singles

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