Estados de la Tregua
Britain managed the Trucial States' external relations (a result of the 1892 'Exclusive Agreement' treaty), including the management of posts and telegraphs - the states were not members of the UPO - the Universal Postal Union). The Government of India opened its first post office in Dubai in 1941 and its operation was taken over by British Postal Agencies, a subsidiary of the GPO (General Post Office) in 1948. Stamps of the time were British stamps surcharged with Rupee values, until in 1959 a set of 'Trucial States' stamps was issued from Dubai.