NORTH KOREA (1993) Newton*. Apple tree*. Law of gravitation*. Block of 4 with missing color. KSC No 3393. Scott No 3266.
AVAILABLE AT $50
NORTH KOREA (1993) Newton*. Telescope*. Equations*. Block of 4 with wrong inscription (binomial theorem from next stamp in series). KSC No 3394. Scott No 3267.
AVAILABLE AT $50
NORTH KOREA (1999) Darwin*. Souvenir sheet with color black missing. KSC No 3968. Scott No 3863.
AVAILABLE AT $50
NORTH KOREA (1999) Darwin*. Souvenir sheet with color red missing. KSC No 3968. Scott No 3863.
AVAILABLE AT $50