UNITED NATIONS (1981) Solar energy. Imperforate pair. Scott No 348, Yvert No 339. From the UN printer archives. Rare!
AVAILABLE AT $60
BURKINA FASO (1985) Solar wind & energy*. Children*. Imperforate strip of 2 with label. PHILEXAFRICA 85. Scott No C310a.
AVAILABLE AT $10
DJIBOUTI (1986) Runners on beach*. Windmill*. Solar power station*. Set of 2 imperforate blocks of 4. Scott Nos 612-3, Yvert Nos 618-9. ISERST Solar Energy Installation.
AVAILABLE AT $40