It was an overseas possession of Oman from 1783 to 1958 .
Gwadar is near the border with Iran , and is located to the east of the Persian Gulf and opposite Oman .
Gwadar was an overseas possession of Oman from 1783 to 1958 .
Gwadar is near the border with Iran , and is located to the east of the Persian Gulf and opposite Oman .