Name
- Persian Gulf Lighting Service, c 1911-1966[remove]7
- HM Treasury, 12th century-3
- Viceroy and Governor-General of India in Council, 1773-19473
- Admiralty, 1708-19642
- Board of Trade, Mercantile Marine Department, 1850-19392
- Chamber of Shipping, United Kingdom, 1878-2
- Foreign Office, 1782-19682
- Government of India, Marine Department, Early 20th century2
- High Commissioner, Iraq, 1920-19322
- Secretary of State for India, United Kingdom, 1858-19352
- Arabian American Oil Company, 1933-19881
- Bahrain Petroleum Company, 1929-1
- Colonial Office, 1854-19661
- Council of Ministers, Iraq, 20th century-1
- Government of India, Commerce Department, 1872-19471
- Government of Iraq, Early 20th century-Mid 20th century1
- Ministry of Foreign Affairs, Iraq, 1924-1
- Persian Gulf Political Residency, 1822-19711
- Political Resident, Persian Gulf, 1822-19711
- Port Directorate, Basra, Early 20th century-Mid 20th century1