Buffalo, N.Y. Sep 16 1901, International machine with "D" die and Pan-American Station cancel ties 5¢ Pan-American (297) on embossed red expo ad cover to Austria, reverse with Buffalo (9.16) and Carlsbad (9.27) backstamps blue printed "O. Moser, Post Office Box 6, Pan-American Station, Buffalo" flap imprint, pull wire patent envelope, clean and Very Fine. Bomar Nos. B01-07A  Estimate $200 - 300. $0 (Image)