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postage
1922 ovpted unwmk p. 14x13.5
| X | 20c on 15c | graygrn | Prince Albert I |
1923 1923 issue p. 11
| X | 20c | redbrn | Prince Louis II |
1924 1924 issue p. 14x13.5
| X | 20c | rose | Prince Louis II profile | |||
| X | 20c | vio | Prince Louis II profile | .20 | .20 |
1932 1932 issue p. 13
| X | 20c | orgbrn | old watchtower |
1937, Dec 20 1937 ovpt issue p. 14x13.5
| X | 20c |
1939, Feb 21 1939 issue - scenic (1939 Monaco) p. 13
| X | 20c | roselil | Cathedral of Monaco |
1960 1960b issue
| - | 20c | brtgrn | Knight Seal of the Prince |
1960, Jun 1 Olympics 1960 issue
| - | 20c | multi | javelin throw |
1960, Jun 1 Oceanographic Museum 50th issue
| - | 20c | multi | Laying out a cage |
1960, Jun 1 nature 1960 issue - nature (1960)
| - | 20c | car & olgrn | Nopalea dejecta | |||
| - | 20c | multi | Pterois volitans |
1964, May 22 1st airplane rally 50th issue (no perf info)
| - | 20c | multi | Vickers-Vimy over map & route London-Port Darwin | — | — |
1980, Nov 6 sea life 1980 issue - sea life (1980) p. 12.75x13
| - | 20c | multi | Spiky Sea Pen Pteroides sp | — | — |
postage due
1905 1905 postage due issue (no perf info)
| - | 20c |
1918 ovpted
| - | 20c on 10c | Prince Albert I |
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