Science
Country: | Sweden |
Quality: | mh - mint hinged |
Year of issue: | 1939 |
Michel number: | 272-275A |
Science
Country: | Sweden |
Quality: | mh - mint hinged |
Year of issue: | 1939 |
Michel number: | 274A |
Chemistry
Country: | Austria |
Quality: | FDC |
Year of issue: | 1987 |
Michel number: | 1889 |
Mathematics
Country: | Soviet Union, USSR |
Quality: | MNH |
Year of issue: | 1987 |
Michel number: | 5757-5759 |
Chemistry
Country: | Czechoslovakia |
Quality: | MNH |
Year of issue: | 1987 |
Michel number: | 2906 |
Chemistry
Country: | Austria |
Quality: | MNH |
Year of issue: | 1987 |
Michel number: | 1889 |
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