Stamps of Korea, 23 base day
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postage
1955, Feb 23 wmk. curved wavy lines (no perf info)
| X | 20h | vio | Rotary emblem | |||
| X | 25h | dlgrn | Rotary emblem | |||
| X | 71h | mag | Rotary emblem |
1955, Oct 23
| X | 20h | cl | Olympic torch & runners | |||
| X | 55h | dkgrn | Olympic torch & runners |
1961, Mar 23 World Meteorological Day 1961 issue wmk. winged circle
| X | 40h | ltbl & dkbl |
1964, Mar 23 national census 1964 issue
| X | 4w | multi |
1968, Nov 23 Anniversary of Student Uprising, Shin Eui Ju, 1945 issue
| - | 7.00w | multi | Memorial to Students’ Uprising |
1969, Oct 23 Completion of Korean Institute of Science and Technology issue
| - | 7w | multi |
1973, Mar 23 100th Anniversary of International Meteorological Organization issue
| - | 10w | multi |
1973, May 23 Victory of South Korean Women's Team in World Table Tennis Championships, Sarajevo issue
| - | 10w | multi |
1975, Feb 23 70th Anniversary of Rotary International issue
| - | 10w | multi |
1980, Aug 23 10th President's Cup Football Tournament issue unwmk
| - | 30w | multi | Football player |
1984, Jun 23 90th Anniversary of International Olympic Committee issue wmk. winged circle
| - | 70w | multi |
1990, Mar 23 World Meteorological Day issue unwmk
| - | 80w | multi | weather satellite clouds |
1991, Mar 23 Expo '93 in 1991 issue
| - | 100w | multi | ||||
| - | 100w | multi |
1992, May 23 400th Anniversary of Start of Im-Jin War issue
| - | 100w | multi |
1995, Jan 23 Protection of Wildlife and Plants 1995 issue
| - | 130w | multi | Rana plancyi | |||
| - | 130w | multi | Bufo bufo |
1997, Apr 23 World Book and Copyright Day 1997 issue
| - | 150w | multi |
2000, Mar 23 50th Anniversary of World Meteorological Organization issue
| - | 170w | multi |
2005, Feb 23 Rotary 100th issue
| - | 220w | multi |
2005, Sep 23 Korean bridge series (2nd)
| - | 220w | multi | Hangang bridge | |||
| - | 220w | multi | Expogyo Bridge | |||
| - | 220w | multi | Tongyeong Bridge | |||
| - | 220w | multi | Banghwa Bridge |
2010, Feb 23 50th Anniversary of Korea-Malaysia Diplomatic Relations issue
| - | 250w | multi | Korean tiger Panthera tigris altaica | |||
| - | 250w | multi | Panthera tigris jacksoni |
2010, Aug 23 XXIII IUFRO world Congress issue
| - | 340w | multi |
2011, Sep 23 2011 Millennial Anniversary of the Tripitaka Koreana issue
| - | 250w | multi |
2015, Jun 23 Universiade 2015 issue (no wmk info)
| - | StandardmailwithinKoreaupto | multi | — | — | ||
| - | StandardmailwithinKoreaupto | multi | — | — | ||
| - | StandardmailwithinKoreaupto | multi | — | — | ||
| - | StandardmailwithinKoreaupto | multi | — | — |
2018, Oct 23 Lion Artifacts - Joint Issue with Iran issue unwmk
| - | 330w | multi | ||||
| - | 330w | multi |
2019, Jan 23 Stamp Design Contest 2019 issue (5 stamps)
| - | 330w | multi | ||||
| - | 330w | multi | ||||
| - | 330w | multi | ||||
| - | 330w | multi | ||||
| - | 330w | multi |
2020, Sep 23 Warrior on Horseback Earthernware Cup issue (no wmk info)
| - | 2480 | multi | — | — |
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