1c Blue, Ty. IV, on Cover (9). Five covers, each better than typically seen, incl. two with L-shaped blocks of three, one Positions 69-70/80R1L, Shawneetown Ill. postmark, Ashbrook notes on back "Rare postmark on block of 3 1c Type IV", other L-shaped block Positions 66-67/76L1L, other three covers with singles incl. Position 51R1L with large to huge margins and sheet margin at left, on part of folded illustrated circular depicting "Second Exhibition of the Metropolitan Mechanics' Institute", also Pos. 6R1L (yielded one of the best examples of Ty. Ib in its earlier incarnation), huge margins to just touched at lower left and with sheet margin at top, on cover with company imprint on top flap from manufacturer of shirts, Very Fine group

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