COMOROS (1956) Village well pump*. Trial color proofs in strip of 5. FIDES issue. Scott No 43, Yvert No 14.
AVAILABLE AT $50
MAURITANIA (1960) Pastoral well*. Trial color proof in reddish-violet. Scott No 120, Yvert No 140. Not easy to find!
AVAILABLE AT $20
NIGER (1966) Water cycle*. Globe*. Scott No 167. Yvert No 173. Hydrological Decade. COMPLETE SHEET OF 25 TRIAL COLOR PLATE PROOFS with color codes in the margin. **. Only 13 complete sheets printed therefore probably the only sheet still intact as most are cut for strips or singles.
AVAILABLE AT $300
IVORY COAST (1972) Jacqueville Lake*. Palm trees*. Trial color plate proofs in strip of 5 with multicolor. Scott No C52, Yvert No PA58. Not easy to find!
AVAILABLE AT $75
NIGER (1966) Water cycle*. Globe*. Trial color proof strip of 5. Scott No 167. Yvert No 173. Hydrological Decade.
AVAILABLE AT $65
GUINEA (1966) Water cycle*. UNESCO emblem*. Set of 5 trial color proofs of the 25 Fr value, in colors different from the final stamp. All but one have the UNESCO emblem and orange dot, but the last has it in green! Symbolic watercycle, issue was for the Decade of International Hydrology. Scott No 434, Yvert No 285. Scarce!
AVAILABLE AT $50
MONACO (1971) Theodolite*. Underwater scene*. Trial color proofs in strip of 5. International Hydrographical Bureau. Scott No 804, Yvert No 861.
AVAILABLE AT $100
MONACO (1981) Hydrographic bureau*. Trial color proofs in strip of 5. Scott No 1284, Yvert No 1279.
AVAILABLE AT $80