Silverton, Col., Aug 26, cds with matching target handstamp tying 1873, 3¢ green on cover to East River, Conn., notation on reverse referring to the original enclosure datelined from La Playa Camp on Aug 21, 1875; some cover tone spots and reduction at left, F.-V.F., one other example of this postmark is reported to exist. Estimate  $150 - 200. $0 (Image)