Stamps, Zwirko & airplane & Wigura design
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Poland
airmail1933, Apr 15 circuit of Europe win issue unwmk (no perf info)
| X | 30g | graygrn | Zwirko & airplane & Wigura |
1934, Aug 28 ovpted
| X | 30g | graygrn | ovpt, Zwirko & airplane & Wigura |
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