Stamps of Russia, 10 Aug 1978
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1978, Aug 10 History of Russian Aircraft issue unwmk (no perf info) (6 stamps)
| - | 4k | multi | Polikarpov U-2 Po-2 1928 | |||
| - | 6k | multi | Kalinin K-5 1929 | |||
| - | 10k | multi | Tupolev TB-3 | |||
| - | 12k | multi | Putilov Stal-2 1931 | |||
| - | 16k | multi | MBR-2 hydroplane 1932 | |||
| - | 20k | multi | I-16 |
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