Muri Bhalissa: Kosta Rica - Bolol tal-posta (1990 - 1999) - 14 bolol.
29. January WM: Xejn Perforazzjoni: 10½
![[Paintings in National Theatre, Tip ALI]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALI-s.jpg)
15. March WM: Xejn Perforazzjoni: 13¼
![[Airmail - International Arts Festival, Tip ALJ]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALJ-s.jpg)
26. March WM: Xejn
![[Issue of 1989 Surcharged, Tip ALK]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALK-s.jpg)
17. May WM: Xejn Perforazzjoni: 10½
![[Dolphins, Tip ALL]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALL-s.jpg)
![[Dolphins, Tip ALM]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALM-s.jpg)
28. May WM: Xejn Perforazzjoni: 13¼
![[The 40th Anniversary of Civil Service Statute, Tip ALN]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALN-s.jpg)
15. July WM: Xejn Perforazzjoni: 10½
![[The 50th Anniversary of Chamber of Industry, Tip ALO]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALO-s.jpg)
19. August WM: Xejn Perforazzjoni: 13¼
![[The 25th Anniversary of University of Costa Rica School of Communication and Sciences, Tip ALP]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALP-s.jpg)
27. August WM: Xejn Perforazzjoni: 10½
![[Tropical Rainforest Flora, Tip ALQ]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALQ-s.jpg)
![[Tropical Rainforest Flora, Tip ALR]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALR-s.jpg)
14. September WM: Xejn Perforazzjoni: 10½
![[The 50th Anniversary of Guaranteed Social Rights, Tip ALS]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALS-s.jpg)
October WM: Xejn Perforazzjoni: 13¼
![[The 15th International Customs Officers' Associations Congress, Tip ALT]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALT-s.jpg)
25. November WM: Xejn Perforazzjoni: 13¼
![[Airmail - The 30th Anniversary of Costa Rican Electrical Institute's Responsibility for Development of Telecommunications, Tip ALU]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALU-s.jpg)
26. November WM: Xejn Perforazzjoni: 10½
![[The 100th Anniversary of the Birth of Miguel Angel Castro Carazo - Founder of Commercial School, 1893-1960, Tip ALV]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/ALV-s.jpg)
