GERMANY (1957) Freiburg University. Archive photo (See Note) of unaccepted design for 500th year of founding.. Scott No 766, Yvert No 135.
AVAILABLE AT $60
GERMANY (1957) Entrance. Archive photo (See Note) of unaccepted design for Ludwig University in Giessen. Scott No 768, Yvert No 137.
AVAILABLE AT $60
NIGER (1965) Woman adding sums. Imperforate dated corner block of 4. Scott No 153, Yvert No 159.
AVAILABLE AT $25
NIGER (1965) Outdoor classroom. Imperforate corner block of 4. Scott No 154, Yvert No 160.
AVAILABLE AT $20
NIGER (1965) Village residents. Imperforate dated corner block of 4. Scott No 155, Yvert No 161.
AVAILABLE AT $25
GERMANY (1970) Comenius. Globe. Manuscript. Archive photo (See Note) of unaccepted design for 300th anniversary of death of theologian and champion of universal education. Scott No 1050, Yvert No 520.
AVAILABLE AT $60
LAOS (1972) Children learning to read. Die proof in black signed by the engraver MIERMONT. International Book Year. Scott No 226, Yvert No 243.
AVAILABLE AT $120
NIGER (1972) Book. Sailing ship. Plane. Die proof in black signed by the engraver. International Book Year - UNSECO. Scott No 253, Yvert No 258. Rare!
AVAILABLE AT $90
LAOS (1972) Father teaching children to read palm leaf book. Die proof in black signed by the engraver JUMELET. International Book Year. Scott No C87, Yvert No PA87.
AVAILABLE AT $120
DAHOMEY (1972) Heuss. Workers Institute. Deluxe sheet. Scott No C158, Yvert No PA164.
AVAILABLE AT $10
PHILIPPINES (1982) Reading campaign. Set of 2 overprinted SPECIMEN. Scott Nos 1608-9.
AVAILABLE AT $10
SRI LANKA (1986) Students studying. Set of 8 progressive proofs. Scott No 778, Yvert No 740. Mahapola scholarship program.
AVAILABLE AT $100
PHILIPPINES (1986) 75th anniversary De La Salle University. Set of 3 overprinted SPECIMEN with control numbers. Scott Nos 1800-2.
AVAILABLE AT $15
PHILIPPINES (1986) De La Salle University founding fathers. S/S overprinted SPECIMEN with control numbers. Scott No 1803.
AVAILABLE AT $10
PHILIPPINES (1986) 85th anniversary Philippine Normal College. Set of 2 overprinted SPECIMEN with control numbers. Scott Nos 1825-6.
AVAILABLE AT $10
PHILIPPINES (1987) Lyceum College* Founder José Laurel. Set of 2 overprinted SPECIMEN. Scott Nos 1851-2.
AVAILABLE AT $10
SRI LANKA (1991) Kingswood College. Original artwork, watercolor on posterboard with acetate overlay for lettering. Signature official stamp and monochrome proof of issued stamp. Design measures 210 x 150 mm. Scott No 1009, Yvert No966. Unique!
AVAILABLE AT $500
TRINIDAD & TOBAGO (1956) Agricultural college. Block of 4 with overprint shifted so it overlaps onto next stamp. Scott No 85.
NIGER (1965) Wheat. Gear. Book. Die proof in red signed by the engraver DURRENS. International Year of Cooperation. Scott No C52, Yvert No PA52. Only 28 exist. Rare!
U.S.A. (1982) Illinois Institute of Technology by van der Rohe. Horizontal misperforation causing the value to appear at the top. Scott No 2020.
EAST GERMANY (1969) "Siberian Teacher" by Sveshnikov. Imperforate phase proof pair in final colors. Scott No 1160, Yvert No 1221.
PHILIPPINES (1979) Rosa Sevilla de Alvero. Set of 1 overprinted SPECIMEN. Scott Nos 1389.
GERMANY (1971) School crossing guard. Archive photo 
ETATS UNIS (1956) Visage féminin* (Institutrice?). Craie. Jolie empreinte bleue de machine à affranchir sur fragment Pitney Bowes No 170373: "Vous vous exprimez mieux avec de la craie. Demandez la qualité 'Hygenia'."
FRANCE (1999) Schoolboys in classroom. Die proof in black signed by the engraver. Photography by Doisneau, one of the pioneers of photo-journalism. Scott No B691, Yvert No 3262.
ETATS UNIS (1957) Abbaye, université et lycée bénédictins. Empreinte rouge de machine à affranchir sur pli Pitney Bowes No 112890: "St. Martin's, c'est une abbaye, une université et un lycée bénédictins."
CZECHOSLOVAKIA (1970) Jan Amos Komensky (Comenius). Die proof in black. 300th anniversary of birth of Czech philosopher and humanist reformer. Scott No 1673, Yvert No 1772. Czech proofs are very rare - only 2-5 were ever made!
VENEZUELA (1973) Bishop Ramos de Lora. Set of 3 progressive proofs. Scott No 1040, Yvert No 884. Founder of University of the Andes.
GAMBIA (1995) Rotary in education. Imperforate margin block of 4. Scott No 1656, Yvert No 1863.
ETATS UNIS (1939) Voilier. Empreinte verte de machine à affranchir sur fragment Pitney Bowes No 74128: "La librairie Johnson's. Livres, papeterie, cadeaux, jouets, antiquités."
CHAD (1966) Pillar. UNESCO emblem. Die proof in black on watermarked paper (rare) signed by the engraver DERREY. 20th anniversary of UNESCO. Scott No 132, Yvert No 129.
CAMEROUN (1966) People. Die proof in dark blue signed by the engraver PHEULPIN. 20th anniversary of UNESCO. Scott No 451, Yvert No 432.
GABON (1968) Book. UNESCO emblem. Die proof in brown on watermarked paper (rare) signed by the engraver MIERMONT. International Literacy Day. Scott No 231, Yvert No 230.
IVORY COAST (1972) Book. Children. Die proof in reddish-violetsigned by the engraver FORGET. International Book Year. Scott No 325, Yvert No 333.