JAPAN (1960) Observatory*. Okayama Astrophysical Observatory overprinted MIHON (specimen). Scott No 707, Yvert No 659. Not easy to find!
AVAILABLE AT $15
PARAGUAY (1971) Kepler*. Astronaut walking in space*. Set of 2 S/S overprinted MUESTRA. Scott Nos C336-7.
AVAILABLE AT $50
GERMANY (1971) Kepler illustration*. MUSTER (specimen) overprint. Scott No 1072
AVAILABLE AT $15
GERMANY (1973) Copernicus*. MUSTER (specimen) overprint. Scott No 1104.
AVAILABLE AT $15
GERMANY (1986) Halley's comet*. Specimen (overprinted MUSTER). Scott No 1456, Yvert No 1105.
AVAILABLE AT $15
GERMANY (1993) Map of world with shipping lanes*. Compass*. MUSTER (specimen) overprint. Scott No 1772, Yvert No 1479. 125th anniversary of North German Naval Observatory.
AVAILABLE AT $15
GERMANY (1971) Planetary orbits*. Specimen overprinted MUSTER. 400th anniversary of Kepler's birth. Scott No 1072, Yvert No 549.
AVAILABLE AT $15