Airmail - The 6th Inter-American Philatelic Exhibition - Buenos Aires, Argentina 1978
Now showing: Costa Rica - Postage stamps - 1978 - Airmail - The 6th Inter-American Philatelic Exhibition - Buenos Aires, Argentina - 1 stamps.
1978
Airmail - The 6th Inter-American Philatelic Exhibition - Buenos Aires, Argentina
24. October WM: None Perforation: 16
![[Airmail - The 6th Inter-American Philatelic Exhibition - Buenos Aires, Argentina, type XQ]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/XQ-s.jpg)