Oman: 1978 Provisionals: Two airmail covers from Salalah to Karachi both franked
Oman
1978 Provisionals: Two airmail covers from Salalah to Karachi both franked by 40b. on 150b. Provisional, plus two registered covers from Muscat to Karachi both franked by the unoverprinted 1975 150b., partially stained but still a good and interesting quartet.
Condition: Cover
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