4c Orange Brown, Coil (350). Guide line pair, rich color, centered to left, machine cancel, lightly folded along center perfs, top stamp with tiny margin flaw at lower right and a few minor perf separations, otherwise Fine and rare genuinely used line pair of this issue, our census of used guide line pairs records only nine, plus one contained in a strip of four, five or six were used in Benton Harbor Mich., the home town of Alvin Filstrup, with 2006 A.P.S. and 2020 P.F. certificates

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