Stamps of Saudi Arabia, 1973, missing color, not overprinted
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postage
1968 1968a issue wmk. crossed swords & palm tree & inscription (no perf info)
| - | 4pi | Wadi Hanifa dam & cartouche Faisal | — | — |
1968 1968b issue
| - | 5pi | gas-oil plant & cartouche Faisal | — | — | ||
| - | 6pi | gas-oil plant & cartouche Faisal | — | — |
1968 1968c issue
| X | 6pi | Prophet's Mosque | multicolored |
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