Denmark # 410 (1963) Niels Bohr - Sgl, MNH
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Denmark 1963
NIELS BOHR and ATOM DIAGRAM
Planetary rotation of S-electron around atom nucleus.
Water Activated Gum
Scott 410
Perforated 13
Stamp Single
NIELS BOHR and ATOM DIAGRAM
Planetary rotation of S-electron around atom nucleus.
Water Activated Gum
Scott 410
Perforated 13
Stamp Single
Mint Never Hinged