20th Anniversary of the first human flight into space, Yuri Gagarin
| Number | Y# 188 |
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| Country | USSR |
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| Period | Soviet Union (1961 - 1991) |
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| Currency | Soviet ruble |
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| Coin type | Commemorative coins |
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| Denomination | 1 ruble |
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| Year | 1981 |
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| Subject | 20th Anniversary of the first human flight into space, Yuri Gagarin |
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| Composition | Copper-Zinc-Nickel |
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| Edge type | Lettered |
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| Edge description | 'ОДИН РУБЛЬ • ОДИН РУБЛЬ •' |
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| Shape | Round |
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| Alignment | Medal (0°) |
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| Weight (g) | 12,8 |
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| Diameter (mm) | 31 |
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| Thickness (mm) | 2,3 |
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