United States, 1861-79 Supplementary Mail Usages. Five covers, 65(3) with Chicago S.M. postmarks, two are in blue, 188 to London with New York S.M. duplex cancels, and 179 on U172 to Germany, also with New York S.M. duplex postmarks; one Chicago blue cover with repaired vertical tear, mostly F.-V.F. Scott No. 65//188  Estimate $200 - 300. $0 (Image)