UNITED NATIONS (1964) Education for Progress. Set of 4 imperforate progressive proof blocks of 4. Scott No 134, Yvert No 130. From the UN printer archives. Rare!
AVAILABLE AT $150
UNITED NATIONS (1988) Woman writing on blackboard*. Set of 5 imperforate progressive proofs. Scott No 524. International Volunteer Day. Ffrom the UN printer archives. Rare!
AVAILABLE AT $50
UNITED NATIONS (1992) UN University Building, Tokyo. Set of 6 imperforate progressive proofs. Scott No 615, Yvert No 618. From the UN printer archives. Rare!
AVAILABLE AT $50
RWANDA (1965) Quill*. Retort*. Radical*. Books*. Set of 4 trail color proofs (missing value). Scott No 84. Rwanda University.
AVAILABLE AT $40
RWANDA (1965) Student peering through microscope*. Set of 7 trail color proofs (missing value). Scott No 85. Rwanda University.
AVAILABLE AT $40
RWANDA (1965) Scales*. Hand*. Set of 5 trail color proofs (missing value). Scott No 86. Rwanda University.
AVAILABLE AT $40
RWANDA (1965) University buildings*. Set of 7 trail color proofs (missing value). Scott No 87. Rwanda University.
AVAILABLE AT $40
RWANDA (1985) Outdoor classroom*. Set of 6 color separations. Scott No 1217. Self-sufficiency in food production.
AVAILABLE AT $60
LAOS (1959) Key of Knowledge*. Globe*. Trial color proofs in strip of 5. Scott No 58, Yvert No 61.
AVAILABLE AT $75