CHAD (1962) Hippopotamus*. Greater Kudu*. Trial color proof margin strip of 3. Prehistoric pictographs. Scott Nos J23-4, Yvert Nos TT23-4.
AVAILABLE AT $40
CHAD (1965) Xylophone (marimba)*. Trial color proof pair. Scott No C23, Yvert No PA26.
AVAILABLE AT $20
CHAD (1965) Olsen perforator*. Trial color proof pair. ITU Centenary. Scott No 112, Yvert No 110.
AVAILABLE AT $15
CHAD (1965) Baudot telegraph distributor*. Trial color proof pair. ITU Centenary. Scott No 114, Yvert No 112.
AVAILABLE AT $15
TCHAD (1967) Chamelier* poursuivant autriche*. Essais de couleur en paire. Mission Bailloud dans l'Ennedi. Peintures rupestres. Yvert No 148, Scott No 150.
AVAILABLE AT $12
CHAD (1968) Funeral vigil*. Trial color pair. Rock paintings. Scott No 165, Yvert No 163.
AVAILABLE AT $15
CHAD (1968) Downhill skier*. Trial color proof pair. Grenoble Olympics. Scott No C40, Yvert No PA44.
AVAILABLE AT $12
CHAD (1968) Ski jump. Trial color proof pair. Grenoble Olympics. Scott No C41, Yvert No PA45.
AVAILABLE AT $12
CHAD (1969) Citharinus latus*. Trial color proof pair. Scott No 219, Yvert No 217.
AVAILABLE AT $20
CHAD (1977) Aching neck*. Trial color proofs in strip of 5 with multicolor. World Rheumatism Year. Scott No 339, Yvert No 335.
AVAILABLE AT $80
AVAILABLE AT $80
AVAILABLE AT $60
CHAD (1985) Dove*. Trial color proofs in strip of 5 with multicolor. Admission to the UN. Scott No 570, Yvert No 500.
AVAILABLE AT $60