On April 28, 1967, a set of stamps was issued by the UN New York administration on the occasion of the World's Fair in Montreal, Canada. The denominations of the stamps were in Canadian dollars. The franking validity of the stamps was limited to the exhibition post office in the UN pavilion at the World's Fair. The gates of the World's Fair were open from April 17, 1967, to October 29, 1967.

FDC used with World Exhibition stamp