Stamps of Saudi Arabia, 20 base day
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postage
1969, Oct 20 20th Anniversary of WHO issue wmk. crossed swords & palm tree (no perf info)
| - | 4pia | multi |
1971, May 20 World Telecommunications Day 1971 issue (no wmk info)
| - | 4pia | ltbl & blk | .20 | |||
| - | 10pia | ltgray & blk |
1976, Mar 20 Islamic Solidarity Conference of Science and Technology, Mecca issue unwmk
| - | 4pia | multi |
1980, May 20 anti-smoking issue
| - | 20h | multi | .20 | |||
| - | 50h | multi |
1989, Dec 20 World Youth Football Championship 1989 issue
| - | 75h | multi | ||||
| - | 100h | multi |
1991, Jun 20 Pilgrimage to Mecca 1991 issue
| - | 75h | multi | ||||
| - | 150h | multi |
1999, Mar 20 Pilgrimage to Mecca 1999 issue
| - | 2r | multi |
2003, May 20 Saoudian Red Crescent issue
| - | 1sr | multi | — | — |
2003, Oct 20 75th Anniversary of the Issue of the First Saudi stamp issue
| - | 1.00sr | multi | — | — |
2005, Aug 20 Saudi Works of Art - History of the Civilization issue - Saudi works of art
| - | 1sr | multi | — | — | ||
| - | 1sr | multi | — | — | ||
| - | 1sr | multi | — | — | ||
| - | 1sr | multi | — | — |
2005, Aug 20 Saudi Monuments - Story of the Civilization issue - Saudi monuments
| - | 2sr | multi | — | — | ||
| - | 2sr | multi | — | — | ||
| - | 2sr | multi | — | — | ||
| - | 2sr | multi | — | — |
2006, May 20 World Cup 2006 issue
| - | 2sr | multi | — | — | ||
| - | 3sr | multi | — | — |
2007, Aug 20 butterflies (2007 Saudi Arabia) (16 stamps)
| - | 2sr | multi | Junonia hierta | — | — | |
| - | 2sr | multi | Melitaea deserticola | — | — | |
| - | 2sr | multi | Funonia orithya cheesmani | — | — | |
| - | 2sr | multi | Eyrema hecabe | — | — | |
| - | 2sr | multi | Papilio demoleus | — | — | |
| - | 2sr | multi | Colitis calas | — | — | |
| - | 2sr | multi | Colitis phisadia | — | — | |
| - | 2sr | multi | Vanessa cardui | — | — | |
| - | 3sr | multi | Junonia hierta | — | — | |
| - | 3sr | multi | Melitaea deserticola | — | — | |
| - | 3sr | multi | Funonia orithya cheesmani | — | — | |
| - | 3sr | multi | Eyrema hecabe | — | — | |
| - | 3sr | multi | Papilio demoleus | — | — | |
| - | 3sr | multi | Colitis calas | — | — | |
| - | 3sr | multi | Colitis phisadia | — | — | |
| - | 3sr | multi | Vanessa cardui | — | — |
2008, May 20 Saudi Aramco celebrating 75 Years issue
| - | 2sr | multi | — | — | ||
| - | 2sr | multi | — | — | ||
| - | 2sr | multi | — | — | ||
| - | 2sr | multi | — | — |
2012, Oct 20 Al Hajj 1433 issue
| - | 2sr | multi | — | — | ||
| - | 2sr | multi | — | — |
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