2c Pan-American (295). Well-centered, Tied by Buffalo N.Y. May 1, 1901 First Day Exposition Machine Slogan pmk. on Attractive Return Card Cover, Very Fine, Rare, with P.F. certificate
4c Pan-American, Center Inverted, "Specimen" Overprint (296aSE). Fresh, hinge remnants, bottom perfs. close to touch, Fine Example of this Striking Error
10c Pan-American (299). Bottom Imprint & Plate No. 1151 Block of Six, Five Mint, small brown printing ink spot on back of selvedge (not visible on face), top perfs. close to touch, Rare