For how many years did Gwadar remain under the rule of Oman

Gwadar stayed an Omani enclave on the Arabian Sea for over five decades. The area rejoined Pakistan in nineteen fifty eight through purchase and a formal transfer. The period commonly taught is about fifty five years. Maritime history questions often test this coastal fact. Fix Gwadar with Oman. Fix the year nineteen fifty eight for integration. That pairing secures fast marks.