JAPAN (1960) Observatory*. Okayama Astrophysical Observatory overprinted MIHON (specimen). Scott No 707, Yvert No 659. Not easy to find!
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