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| Issuer | Bulgaria |
|---|---|
| Year | 1979 |
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| Technique | Milled |
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| Obverse lettering | НАРОДНА РЕПУБЛИКА БЪЛГАРИЯ 1979 10 ЛЕВА (Translation: The People's Republic of Bulgaria 10 Leva) |
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| Edge | Lettered |
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| Additional information |
Issued to mark the flight of Georgi Ivanov aboard Soyuz 33 in April 1979 — Bulgaria's first cosmonaut mission — this coin was struck before the mission's outcome was fully known. The docking with Salyut 6 failed due to a main engine malfunction, and Ivanov and Soviet commander Nikolai Rukavishnikov were forced to abort using the backup engine, itself performing below specification. The crew survived, but the mission never achieved its primary objective.
The .500 fine silver content reflects Bulgaria's constrained hard-currency position during the period, a deliberate economy applied across most of the country's commemorative output from these years.