6c Proprietary, Orange, Perforated (R31c). Bright color, light "A.M.F.C. Aug. 9, 1871" three-line cancel, long full perfs all around, much better centering than usual, small repair at top left and small closed tear, otherwise Very Fine, a rare well-centered example of this notoriously challenging stamp, which is almost always faulty, with 2001 P.F. certificate

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