Now showing: Bulgaria - Postage stamps - 1978 - The 20th Anniversary of Comecon - 1 stamps.
1. March WM: None Perforation: 13
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![[The 20th Anniversary of Comecon, type CPH]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/CPH-s.jpg)
