U.S.A. (1962) Monorail*. Space Needle*. Seattle World's Fair. Misperforation and miscut in block of 10. Scott No 1196. Yvert No 729. Spectacular!
AVAILABLE AT $50
PORTUGUESE INDIA (1959) Brussels World Fair. 80c on 1rp with inverted overprint. Scott No 597. Only 1 sheet known.
AVAILABLE AT $65
GUINEA (1964) New York World Fair*. Imperforate gutter pair of S/S with vignette inverted. Scott No C63.
AVAILABLE AT $50
GUINEA (1965) New York World Fair*. Imperforate gutter pair of S/S. Vignette inverted! Scott No C65.
AVAILABLE AT $50
GUINEA (1965) New York World Fair*. Imperforate gutter pair of S/S. Orange color omitted! Scott No C69.
AVAILABLE AT $50
GUINEA (1965) New York World Fair*. Imperforate gutter pair of S/S. Vignette inverted! Scott No C69.
AVAILABLE AT $50
GUINEA (1965) New York World Fair*. Imperforate gutter pair of S/S. Vignette inverted! Scott No C70.
AVAILABLE AT $50
CAMEROUN (1967) Canadian pavilion at Montreal Expo*. Overprinted for Apollo XI moon landing. Inverted overprint! Scott No C94.
AVAILABLE AT $80