දැන් පෙන්වන්නේ: කොස්ටා රිකා - තැපැල් මුද්දර (1990 - 1999) - 10 මුද්දර .
25. March WM: කිසිවක් නැත සිදුර: 10½
![[Airmail - Paintings in National Theatre, වර්ගය AKG]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Costa-Rica/Postage-stamps/AKG-s.jpg)
24. May WM: කිසිවක් නැත සිදුර: 10½
![[The 50th Anniversary of Costa Rica-Panama Boundary Treaty, වර්ගය AKH]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Costa-Rica/Postage-stamps/AKH-s.jpg)
![[The 50th Anniversary of Costa Rica-Panama Boundary Treaty, වර්ගය AKI]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Costa-Rica/Postage-stamps/AKI-s.jpg)
![[The 50th Anniversary of Costa Rica-Panama Boundary Treaty, වර්ගය AKJ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Costa-Rica/Postage-stamps/AKJ-s.jpg)
13. September WM: කිසිවක් නැත
![[Airmail - National Stamp Exhibition "Exfilcori '91" - Costa Rica - Issue of 1990 Overprinted "Aereo EXFILCORI '91", වර්ගය AKK]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Costa-Rica/Postage-stamps/AKK-s.jpg)
11. October WM: කිසිවක් නැත
![[Airmail - The 100th Anniversary of Basketball, වර්ගය AKL]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Costa-Rica/Postage-stamps/AKL-s.jpg)
11. October WM: කිසිවක් නැත සිදුර: 13
![[The 500th Anniversary (1992) of Discovery of America by Columbus, වර්ගය AKM]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Costa-Rica/Postage-stamps/AKM-s.jpg)
21. October WM: කිසිවක් නැත
![[Issue of 1984 and 1988 Surcharged, වර්ගය AKO]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Costa-Rica/Postage-stamps/AKO-s.jpg)
![[Issue of 1984 and 1988 Surcharged, වර්ගය AKO1]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Costa-Rica/Postage-stamps/AKO1-s.jpg)
1. November WM: කිසිවක් නැත සිදුර: 13¼
![[Airmail - The 50th Anniversary of Social Security Administration, වර්ගය AKN]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Costa-Rica/Postage-stamps/AKN-s.jpg)
