JAPAN (1960) Observatory*. Okayama Astrophysical Observatory overprinted MIHON (specimen). Scott No 707, Yvert No 659. Not easy to find!
AVAILABLE AT $15
GERMANY (1986) Halley's comet*. Specimen (overprinted MUSTER). Scott No 1456, Yvert No 1105.
AVAILABLE AT $20
PARAGUAY (1986) Halley's comet*. Giotto probe*. S/S overprinted MUESTRA. Scott No C644.
AVAILABLE AT $25
NORTH KOREA (2009) International Year of Astronomy. Set of 4 minisheets of total 13 specimens. Scott Nos 4866-4868b.
AVAILABLE AT $65