CONGO - Artist proof (1963) Tree. Scales. Die proof in blue signed by the engraver DURRENS. Scott No 95, Yvert No 93. (Image)

NIGER - Trial Color Proof (1963) Man. Globe. Trial color proofs in strip of 5 with multicolor. Scott No 128, Yvert No 134. (Image)

CHAD - Artist proof (1971) Symbolic Tree. Die proof in reddish-orange signed by the engraver MONVOISIN. International Year Against Racial Discrimination. Scott No 236, Yvert No 234. (Image)

UPPER VOLTA - Artist proof (1971) Men of 4 races. Die proof in brown signed by the engraver COMBET. International Year Against Racial Discrimination. Scott No 240, Yvert No 238. (Image)

DAHOMEY - Artist proof (1971) Hands. Heart. Die proof in green signed by the engraver COMBET. International Year Against Racial Discrimination. Scott No 283, Yvert No 303. (Image)

DAHOMEY - Artist proof (1971) Globe. Heart. Die proof in dark green signed by the engraver COMBET. International Year Against Racial Discrimination. Scott No 284, Yvert No 304. (Image)

RWANDA - Trial Color Proof (1972) Painter. Weaver. Set of 8 color separations. Scott No 490. Fight against racism.. (Image)

MALI - Artist proof (1978) Black Children. Horse. Die proof in black signed by the engraver GAUTHIER. International Year Against Apartheid. Scott No 297, Yvert No 299. (Image)

MAURITANIA - Deluxe proof (1978) Children behind chain fence. Deluxe sheet. Anti-Apartheid Year. Scott No 394, Yvert No 396. (Image)

GABON - Artist proof (1978) Men of 3 races. Die proof in violet signed by the engraver GUILLAUME. International Year Against Apartheid. Scott No 408, Yvert No 406. (Image)