The 50th Anniversary of the Air Transport Institute 2021
Now showing: Bulgaria - Postage stamps - 2021 - The 50th Anniversary of the Air Transport Institute - 1 stamps.
2021
The 50th Anniversary of the Air Transport Institute
19. May WM: None Sheetsize: 50 Design: Plamen Djermanov Perforation: 13
![[The 50th Anniversary of the Air Transport Institute, type HJO]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/HJO-s.jpg)
