Buffalo, N.Y. Pan-American Sta. Oct 21 1901, three strikes of duplex ties 1¢-10¢ Pan-American (294-299) complete set on multicolor Exposition ad cover to DeWitt, Iowa, Oct 22nd receiving backstamp; 10¢ with small tear at top right, otherwise Very Fine; with 2015 P.F. certificate. Bomar Nos. B01-01  Estimate $2,000 - 3,000. A REMARKABLE EXAMPLE OF THIS EXPO MARKING ON COVER WITH A COMPLETE SET OF THE PAN-AMERICAN ISSUE. The left strike is one of the clearest strikes recorded of this marking. This is likely the only recorded use of B01-01 with a complete set. $0 (Image)