Confederacy, South Carolina Flag. In blue (Dietz FSC-3) on cover franked with United States 1857 3¢ dull red (small defect) cancelled by grid and postmarked "Charleston, S.C./Mar. 17, 1861" cds, addressed to Col. A.P. Calhoun (son of John C Calhoun), Pendleton Village, S.C., cover slightly reduced at top, otherwise Very Fine, a nice Confederate States usage. Estimate  $500 - 750. $0 (Image)