Confederacy, United States 1857 3¢ dull red, Last Day Cover. Two singles, left stamp with trivial perf. flaw, tied by two strikes of "Charleston, S.C./May 31, 1861" double circle on cover to Chersaw, S.C., addressee scratched out & replaced causing some small erosion holes, handsome Very Fine appearance; with 2007 C.S.A. certificate. Scott No. U.S. 26  Estimate $300 - 400. A Key Exhibit Piece - the last day of the U.S. postage rate before the Confederate Post Office took over on June 1, 1861, Ex-Antrim. $0 (Image)