San Diego, Cal. Exposition Sta./Mar. 17, 1916. Bold strikes of duplex cancel tying 1¢ Washington-Franklin imperf. pair on green cover to Cleveland, original enclosure included on matching green card for St. Patrick's Day, cover open on three sides, Extremely Fine, a rare usage during the 1916 extension of the Exposition, only 6 recorded examples. Estimate  $100 - 150. $0 (Image)