Stamps of Cambodia, 23 Apr 1992
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postage
1992, Apr 23 Expo '92 issue - inventors (1992) unwmk (no perf info) (6 stamps)
| - | 5r | multi | Juan de la Cierva | .20 | .20 | |
| - | 15r | multi | Thomas Edison | .20 | .20 | |
| - | 80r | multi | Samuel Morse | .20 | ||
| - | 400r | multi | Narciso Monturiol and "Icteneo" | |||
| - | 1000r | multi | Robert Fulton | — | — | |
| - | 1500r | multi | Alexander Graham Bell |
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