Stamps of Guatemala, 31th of any month of any year
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postage
1956, Jul 27 1954 liberation issue unwmk (no perf info)
| - | 3c | Oil Pipeline | — | — |
1977, Oct 31 4th International Fair, Guatemala City issue
| - | 0.07q | multi | .20 |
1980, Jul 31 Rotary 75th issue
| X | 4c | multi | ||||
| - | 6c | multi | diamond | |||
| - | 10c | multi | Paul P Harris |
2002, Oct 31 125th Anniversary of Universal Postal Union issue
| - | 0.20q | multi | .20 | .20 | ||
| - | 2.00q | multi | ||||
| - | 3.00q | multi | ||||
| - | 5.00q | multi |
airmail
1948, Aug 31 4th Central American and Caribbean Football Championship Games issue (5 stamps)
| - | 3c | car & blk | ||||
| - | 5c | blgrn & blk | ||||
| - | 10c | vio & blk | ||||
| - | 30c | bl & blk | ||||
| - | 50c |
1966, Oct 31 1966 air issue
| - | 5c | yel | .20 | |||
| - | 5c | multi | .20 |
1975, Dec 31 100th Anniversary of Guatemalan Stamps 1971 issue
| - | 6c | grn | .20 | .20 | ||
| - | 6c | org | .20 |
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