CZECHOSLOVAKIA (1973) Heraldic flag*. Die proof in black. 400th anniversary of University of Olomouc. Scott No 1889, Yvert No 1992. Czech proofs are very rare - only 2-5 were ever made!
AVAILABLE AT $125
NIGER (1972) Book*. Sailing ship*. Plane*. Die proof in black signed by the engraver. International Book Year - UNSECO. Scott No 253, Yvert No 258. Rare!
AVAILABLE AT $90
CAMBODIA (1968) Royal University*. Die proof in brown signed by the engraver MIERMONT. Scott No 188.
AVAILABLE AT $140
CAMBODIA (1968) Engineering school*. Die proof in red signed by the engraver FENNETEAUX. Scott No 189.
AVAILABLE AT $140
CAMBODIA (1968) University center*. Die proof in brown signed by the engraver FENNETEAUX. Scott No 190.
AVAILABLE AT $140
NIGER (1970) Book*. Compass*. Die proof in violet signed by the engraver MONVOISIN. World Education Year. Scott No C120, Yvert No PA120. Rare!
AVAILABLE AT $100
IVORY COAST (1971) Man operating drill press*. Die proof in violet signed by the engraver COMBET. Scott No 316, Yvert No 320.
AVAILABLE AT $120
NIGER (1972) Book*. Die proof in dark green signed by the engraver. International Book Year - UNESDO. Scott No 252, Yvert No 257. Rare!
AVAILABLE AT $90
FRANCE (1995) School for Oriental Languages*. Epreuve d'Atelier signed by the engraver LAVERGNE. Scott No 2470, Yvert No 2938.
AVAILABLE AT $175
NIGER (1967) National Audio-Visual Center*. Die proof in violet signed by the engraver FORGET. Scott No C73, Yvert No PA73.
AVAILABLE AT $140
ST. PIERRE & MIQUELON (2011) Henriette Bonin. Die proof in black signed by the engraver BEAUJARD. Scott No 927, Yvert No 999.
AVAILABLE AT $140