NIGER (1973) Sun*. Storm clouds*. Lightning*. Satellite*. Trial color proof pair. Centenary of international meteorological cooperation. Scott No C214, Yvert No PA214. Hard to find!
AVAILABLE AT $25
NIGER (1977) Satellite*. Weather fronts*. Trial color proofs in strip of 5. World Meteorology Day. Scott No 393, Yvert No 398. Attractive!
AVAILABLE AT $80
MAURITANIA (1985) Drop of water*. Dead trees*. Set of 3 progressive proofs including final colors. Fight against drought. Scott No 588, Yvert No 563.
AVAILABLE AT $25