Treasury Dept., 1873, 6¢ brown. Canceled by blue manuscript and tied by matching "E. Concord, N.Y., Nov 29/74" postmark on cover to Washington D.C.; central cover file fold and reduced at left, F.-V.F.; with 1986 P.F. certificate. Scott No. O75  Estimate $150 - 200. $0 (Image)

Treasury Dept., 1873, 6¢ brown. 5 covers (4 legal size), fine, some stamp or cover faults, includes pink postmark, blue postmark, 6¢ used with 3¢ (O74), Fine overall. Scott No. O75  Estimate $100 - 150. $0 (Image)

Treasury Dept., 1873, 6¢ brown. Block of 4, neat manuscript cancels, nicely centered, bold color, Very Fine, choice and scarce multiple. Scott No. O75  $500. $0 (Image)

Treasury Dept., 1873, 6¢ brown. Irregular block of 8, each with partial blue target cancel, small faults, otherwise Fine, a very scarce large multiple. Scott No. O75  Estimate $150 - 200. $0 (Image)