Now showing: Bulgaria - Postage stamps (1879 - 2024) - 1 stamps.
23. April WM: None Perforation: 13
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![[International Workers` Day, type ABM]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/ABM-s.jpg)
![[International Workers` Day, type ABN]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Bulgaria/Postage-stamps/ABN-s.jpg)
