The medal's obverse bears Liberty walking alongside a Buffalo. Around top, PAN-AMERICAN EXPOSITION; in exergue, field for dedication.
The medal's reverse bears South-American and North-American Native Americans smoking peace pipe together, shields with representations of their respective continents at their feet. Above, BVFFALO / VSA MCMI
The Pan-American Exposition was a World's Fair held in Buffalo, New York from May 1st through November 2nd, 1901. The exposition is most remembered for the shooting of U.S. President William McKinley. Anarchist Leon Czolgosz shot him on September 6th while he was visiting the fair.
The medal exists in plain bronze, silver, gilted bronze, and gold variants. The silver and gold variants are very rare but no mintages have been reported. A golden piece was auctioned in 2017 by Rago Fine Arts for over $40,000.
The medal measures 64mm in diameter and was manufactured by the Gorham Silver Company.
References: Baxter 106, Marqusee 250