1881 Milwaukee Industrial Exposition, all-over ad design on cover bearing two 2¢ vermilion (178) singles tied by two strikes of target cancels duplexed with "Milwaukee Wis. Jan 6" cds, locally addressed; small edge tears and small bit of flap missing; F.-V.F., a scarce expo design. Scott No. 178  Estimate $100 - 150. $0 (Image)