The City of Istanbul is in the country of Turkey and located on the coast of the Sea of Marmara.
While on assignment in Morocco, Bruno Lawrie told Cate Archer about the first time they had discovered a traitor in UNITY. Mr. Jones' administrative assistant had sold them out for a mere 50 quid. Because of this act, UNITY lost several undercover operatives in Istanbul.
- This event happened several years before 1967.
Istanbul on Wikipedia