Confederacy, 1863, 10¢ Blue, Die A, Perforated, Block of Four, dark shade and fine impression, each stamp cancelled by open grid, possibly an army field office grid, but also similar to the device used at Brookhaven Miss. where perforated stamps are known to have originated, Fine and extremely rare used block; with 2006 C.S.A. certificate. Scott No. 11e  Estimate $5,000 - 7,500. THE ONLY RECORDED USED BLOCK OF THE 1863 10¢ BLUE DIE A. $0 (Image)