Now showing: Bulgaria - Postage stamps (1930 - 1939) - 3 stamps.
9. May WM: None Perforation: 11½
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![[Exhibition of Airmail Postage Strasbourg - Airplane over City, type DK]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/DK-s.jpg)
![[Exhibition of Airmail Postage Strasbourg - Airplane over City, type DK1]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/DK1-s.jpg)
![[Exhibition of Airmail Postage Strasbourg - Airplane over City, type DK2]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/DK2-s.jpg)
