NORTH KOREA (2011) Ri Sung Gi. Marie Curie. Molecules. Photo proof from printer's archive. Scott No 5027. KSC No 4768D. Only 5-10 printed as test print prior to actual printing of the stamps. Each has official Korea Post stamp on reverse. International Year of Chemistry.
AVAILABLE AT $100
ANTIGUA (2008) Explorer III launch, in orbit. Van Allen radiation belt. Imperforate M/S of 6. Scott No 3014.
AVAILABLE AT $40
GABON (1965) Uranium mining. Die proof in black signed by the engraver DECARIS. Scott No 182, Yvert No 181.
AVAILABLE AT $140
NIGER (1966) Crab*. Atomic symbol*. Imperforate block of 4. Anti-cancer conference, Tokyo. Scott No C66, Yvert No PA66.
AVAILABLE AT $20
CHAD (1976) Albert Einstein*. Imperforate corner block of 4. Scott No C196, Yvert No PA183.
AVAILABLE AT $20
GHANA (1964) Einstein*. Atomic symbol*. G. W. Carver*. Sweet potato*. Set of 3 imperforate blocks of 4. Scott Nos 189-91. Human Rights Day.
AVAILABLE AT $60
GHANA (1964) Einstein*. Atomic symbol*. G. W. Carver*. Sweet potato*. Set of 3 imperforate pairs. Scott Nos 189-91. Human Rights Day.
AVAILABLE AT $30