Stamps of Switzerland, winged propeller overprint

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airmail

1919, Apr 30 1919 air issue ovpted granite paper wmk. Swiss cross p. 11.5
Swissairmail30%25D1%25811919scottC1.jpgColnect-139-433-Airmail.jpg
- 30 on 30(c) yelbrn & palegrn Helvetia seated (1920)
- 50 on 50(c) dpgrn & palegrn Helvetia seated

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