NORTH KOREA (1984) Mendeleev*. Specimen. KSC No 2476, Michel Block 192.
AVAILABLE AT $10
GERMANY (1989) Maze*. Exclamation, question marks*. MUSTER (Specimen) overprint. Youth Science & Technology Competition. Scott No 1597, Yvert No 1285.
AVAILABLE AT $12
GERMANY (2001) Plant*. Overprinted MUSTER (specimen). Leonhart Fuchs, one of the founding fathers of botany. Scott No 2106.
AVAILABLE AT $20
NORTH KOREA (1991) Research ship*. Antarctic exploration. Specimen pair. KSC No 3082, Michel No 3203.
AVAILABLE AT $15
NORTH KOREA (1993) Isaac Newton*. Specimen pair. KSC No 3392, Michel No 3483.
AVAILABLE AT $15
NORTH KOREA (1993) Apple tree*. Newton*. Specimen pair. KSC No 3393, Michel No 3484.
AVAILABLE AT $15
NORTH KOREA (1993) Telescope*. Newton*. Specimen pair. KSC No 3394, Michel No 3485.
AVAILABLE AT $15
GERMANY (1981) Arts and Science Medal*. Specimen (overprinted MUSTER). Scott No 9N464, Yvert No 609.
AVAILABLE AT $12