Sonora, Cal., Apr 10, 1857 (Tuolumne), two intensely bold strikes of cds (TUO-1400, R-4) tying 1851, 1¢ blue, type II, horizontal strip of three on cover to Watsonville; light cover corner wear at bottom and missing most of backflap, still Extremely Fine gem strikes, ex Knapp. Scott No. 7  Estimate $150 - 200. $0 (Image)