NIGER (1972) Book*. Tall ship*. Plane*. Set of 2 trial color proof blocks of 4. UNESCO Book Year. Scott Nos 252-3, Yvert Nos 257-8.
AVAILABLE AT $60
FRANCE (1976) Stylised flower*. Trial color proof strip of 3 in different colors. Scott No 2O17, Yvert No S51.
AVAILABLE AT $50
LAOS (1958) Mother* with arms around globe* and children*. U.N.E.S.C.O.*. Scott No 50. Yvert No 52. Trial Color Plate Proofs in margin strip of 5 with multicolor. **.
AVAILABLE AT $80
LAOS (1958) Eléphants*. U.N.E.S.C.O.* et Tour Eiffel*. Déesse*. Yvert No 54. Scott No 51. Inauguration du palais de l'U.N.E.S.C.O. à Paris. Essais de couleur en bande de 5, bord de feuille, avec multicolore. **.
AVAILABLE AT $120
MONACO (1966) UNESCO 20th anniversary. Trial color proof block of 4. Scott No 642, Yvert No 700.
AVAILABLE AT $50
GABON (1966) Student*. UNESCO emblem*. Trial color proofs in margin strip of 5 with multicolor and printer's color codes penciled in margin. 20th anniversary of UNESCO. Scott No C48, Yvert No PA50. Scarce!
AVAILABLE AT $60
MALI (1966) UNESCO emblem*. Stylized people*. Trial color proofs in strip of 5 with multicolor. 20th anniversary. Scott No C37, Yvert No PA37.
AVAILABLE AT $60
IVORY COAST (1972a) Children reading book*. Trial color proofs in strip of 5 with multicolor. International Book Year. Scott No 325, Yvert No 333.
AVAILABLE AT $60
IVORY COAST (1972b) Children reading book*. Trial color proofs in strip of 5 with multicolor. International Book Year. Scott No 326, Yvert No 334.
AVAILABLE AT $60
FRANCE (1966) UNESCO*. Trial color proof in brown. Scott No 2O7, Yvert No SER37.
AVAILABLE AT $40
MOROCCO (1958) UNESCO building*. Mohammed V*. Trial color proofs in strip of 5 with multicolor. Scott No 25, Yvert No 386.
AVAILABLE AT $60