Stamps of Vietnam - South Vietnam, 21th of any month of any year
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postage
1957, Oct 21 Colombo Plan Conference 1957 issue unwmk (no perf info) (5 stamps)
| - | 20c | .20 | .20 | |||
| X | 40c | ol | .20 | .20 | ||
| - | 50c | .20 | ||||
| - | 2pi | .20 | ||||
| - | 3pi | .20 |
1960, Nov 21 FAO conference issue
| - | 2pi | grn & blgrn | .20 | |||
| - | 4pi | bl & ultra | — | — |
1963, Mar 21 Freedom from Hunger issue
| - | 50c | orgred | farmer & farm & FAO emblem | .20 | .20 | |
| - | 1pi | dkcar | farmer & farm & FAO emblem | .20 | ||
| - | 3pi | pur | farmer & farm & FAO emblem | .20 | ||
| X | 5pi | vio | farmer & farm & FAO emblem | .20 |
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