NIGER (1974) Infant*. Die proof in grey signed by the engraver COMBET. World population year. Scott No 207, Yvert No 301.
AVAILABLE AT $80
CENTRAL AFRICA (1974) Stylized people*. Die proof in black signed by the engraver. World Population Year. Scott No 211, Yvert No 220. Only 28 exist. Rare!
AVAILABLE AT $140
IVORY COAST (1974) WPY emblem*. Die proof in black signed by the engraver JUMELET. World population year. Scott No 379, Yvert No 374.
AVAILABLE AT $100
MONACO (1978) Ship*. Mediterranean sea*. Die proof in black signed by the engraver BETEMPS. Plan RAMOGE for protection of the sea. Scott No 1111, Yvert No 1134.
AVAILABLE AT $160
CAMBODIA (1972) United Nations emblem*. Die proof in green signed by the engraver MIERMONT. Scott No 292. Yvert No 307. United Nations Conference on the Human Environment.
AVAILABLE AT $140
NIGER (1974) Infant*. Globe*. Die proof in dark blue signed by the engraver COMBET. World population year. Scott No 297, Yvert No 301.
AVAILABLE AT $100