NIGER (1965) Men closing bags of peanuts*. Set of 4 trial color proofs with multicolor issued to publicize Niger's peanut industry. Scott No C33, Yvert No PA33. Hard to find!
AVAILABLE AT $40
LAOS (1957) Winnowing rice*. Trial color proof. Scott No 39, Yvert No 42.
AVAILABLE AT $12
SENEGAL (1965) Abdoulaye Seck*. Trial color proofs in strip of 5. Director of the Senegal Institute of Agricultural Research. Scott No 245, Yvert No 250.
AVAILABLE AT $65