Stamps of Costa Rica, 20 base day
1 to 50 of 52
postage
1960, Apr 20 Justo Facio 100th issue unwmk p. 14
| - | 10c | Justo Facio |
1970, May 20 Inauguration of the New Administration Building of the Universal Postal Union issue (no perf info)
| - | 35c | multi | ||||
| - | 60c | multi |
1987, Nov 20 500th Anniversary of Discovery of America issue
| - | 4col | map of Costa Rica, p. 13.25 | ||||
| - | 4col | Map of Central America, p. 13.25 | ||||
| - | 4col | multi | Native necklace (1988) | |||
| - | 4col | multi | Golden frog & coin, p. 10.5 (1989) |
2001, Jul 20 150th Anniversary of Costa Rica-Netherlands Co-operation Treaty issue
| - | 65col | multi |
2006, Mar 20 Cartago Football Club 100th issue (no perf info)
| - | 85col | multi |
2007, Sep 20 Special Olympics 2007 issue
| - | 240col | multi | ||||
| - | 240col | multi | ||||
| - | 240col | multi | p. 11 |
2013, Jun 20 Costa Rica a Country of Immigrants issue (no wmk info) (no perf info)
| - | 500col | multi | — | — |
2014, Aug 20 National Parks 2014 issue
| - | 690col | multi | jaguarundi | — | — | |
| - | 1220col | multi | jaguar | — | — |
2017, Jul 20 Common insects of Costa Rica issue - Common insects of Costa Rica p. 11
| - | 420col | multi | Carneades superba | — | — | |
| - | 550col | multi | Edessa rufomarginata | — | — | |
| - | 650col | multi | Chrysina aurigans | — | — | |
| - | 900col | multi | Golofa costaricensis | — | — |
airmail
1947, May 20 1947 Columbus issue Columbus at Cariari unwmk (no perf info) (6 stamps)
| - | 25c | grn & blk | Columbus at Cariari | — | — | |
| - | 30c | ultra & blk | Columbus at Cariari | — | — | |
| - | 40c | redorg & blk | Columbus at Cariari | — | — | |
| - | 45c | vio & blk | Columbus at Cariari | — | — | |
| - | 50c | car & blk | Columbus at Cariari | — | — | |
| - | 65c | brnorg & blk | Columbus at Cariari | — | — |
1950, Jul 20 War for National Liberation 2nd issue (8 stamps)
| - | 15c | red & blk | — | — | ||
| - | 20c | grn & blk | — | — | ||
| - | 25c | multi & blk | — | — | ||
| - | 35c | brn & blk | — | — | ||
| - | 55c | vio & blk | — | — | ||
| - | 75c | org & blk | — | — | ||
| - | 80c | gray & blk | Dr. C. L. Valverde | — | — | |
| - | 1col | org & blk | Dr. C. L. Valverde | — | — |
1965, Dec 20 Incorporation of Nicoya District issue (6 stamps)
| - | 5c | blk & redbrn | L. Briceno B. | |||
| - | 10c | ltbl & blk | ||||
| - | 15c | olbrn & dkblgrn | ||||
| - | 35c | |||||
| - | 50c | multi | ||||
| - | 1col |
1978, Nov 20 500th Anniversary of Gonzalo Fernandez de Oviedo issue p. 11
| - | 0.85col | multi | ||||
| - | 1.20col | |||||
| - | 10.00col | multi |
1987, Nov 20 500th Anniversary of Discovery of America issue p. 13.25
| - | 45col | multi | "Nina" (1992) | |||
| - | 45col | multi | "Santa Maria" (1992) | |||
| - | 45col | multi | "Pinta" (1992) |
postal tax
1964, Nov 20 1964 tax issue p. 12.5
| - | 5c | blgrn | ||||
| - | 5c | lil | ||||
| - | 5c | bl | ||||
| - | 5c | brn |
special delivery
1972, Mar 20 (no perf info)
| - | 75c | brn & carred |
1 to 50 of 52