CONGO - Artist proof (1970b) Trygve Lie. UN emblem. Die proof in violet signed by the engraver MONVOISIN. 25th anniversary of UN. Scott No 220, Yvert No 266. (Image)

CONGO - Artist proof (1970c) U Thant. UN emblem. Die proof in dark blue signed by the engraver MONVOISIN. 25th anniversary of UN. Scott No 221, Yvert No 267. (Image)

MALI - Trial Color Proof (1971) Hands. Rose. UNICEF emblem. Trial color proofs in strip of 5 with multicolor. 25th anniversary. Scott No 154, Yvert No 156 (Image)

MALI - Trial Color Proof (1971) Children. UNICEF emblem. Trial color proofs in strip of 5 with multicolor. 25th anniversary. Scott No 155, Yvert No 157. (Image)

RWANDA - Trial Color Proof (1974) World population year. Set of 6 color separations. Scott No 662. (Image)

RWANDA - Trial Color Proof (1974) Population graph. Set of 6 color separations. Scott No 663. World Population Year. (Image)

CONGO - Deluxe proof (1975) Paul Hoffman. Deluxe sheet honoring the first administrator of the UN Development Program. Scott No 320, Yvert No 369. (Image)

UPPER VOLTA - Artist proof (1976) UPU emblem. UN emblem. Die proof in violet-black signed by the engraver MONVOISIN. 25th anniversary of UNPA. Scott No 405, Yvert No 395. (Image)

ZAIRE - Imperforate (1985) UN 40th anniversary. Set of 2 imperforates. Scott Nos 1205-6. (Image)

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)

CONGO - Imperforate (1963) Freedom from Hunger. Imperforate S/S. Scott No B51. (Image)

CENTRAL AFRICA - Artist proof (1965) UN emblem. Grain. Die proof in brown signed by the engraver BEQUET. UN Hunger issue. Scott No 61, Yvert No 60. (Image)

CONGO - Artist proof (1973) UN emblem. Grain. Die proof in black signed by the engraver HALEY. 10th anniversary FAO. Scott No 292, Yvert No 342. (Image)

CONGO - Artist proof (1973) UN emblem. Grain. Die proof in red signed by the engraver HALEY. 10th anniversary FAO. Scott No 293, Yvert No 343. (Image)

CONGO - Artist proof (1973) UN emblem. Grain. Die proof in dark blue signed by the engraver HALEY. 10th anniversary FAO. Scott No 294, Yvert No 344. (Image)

GABON - Artist proof (1981) Tractor. Wheat. Farmers. FAO emblem. Die proof in black signed by the engraver JUMELET. World Hunger Day. Scott No 485, Yvert No 478. (Image)