GUINEA (1964) New York World Fair*. Trial color proof gutter pair of S/S. Scott No C63.
AVAILABLE AT $30
GUINEA (1965) New York World Fair*. Trial color proof gutter pair of S/S. Scott No C69. Same colors as C70.
AVAILABLE AT $30
GUINEA (1965) New York World Fair*. Trial color proof gutter pair of center vignette of S/S. Scott No C69.
AVAILABLE AT $30
GUINEA (1965) New York World Fair*. Imperforate gutter pair of center vignette of S/S. Scott No C70.
AVAILABLE AT $30
GUINEA (1966) Water cycle*. UNESCO emblem*. Trial color proof pair. Symbolic water cycle, issue was for the Decade of International Hydrology. Scott Nos 434, Yvert No 285.
AVAILABLE AT $15