ETHIOPIA (1973) WMO emblem*. Set of 4 progressive proofs. Scott No 661, Yvert No 666. Centenary of Meteorological Cooperation.
AVAILABLE AT $100
ETHIOPIA (1973) Anemometer*. WMO emblem*. Set of 2 progressive proofs. Scott No 662, Yvert No 667. Centenary of Meteorological Cooperation.
AVAILABLE AT $100
DAHOMEY (1973) UN emblem*. Meteorology symbols*. Trial color proofs in strip of 5 with multicolor. WMO Centenary. Scott No C188, Yvert No PA190.
AVAILABLE AT $100