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The year 1939 was the 158th year of the Rattanakosin Kingdom of Siam. It was the fifth year in the reign of King Ananda Mahidol (Rama VIII), and is reckoned as year 2481 (1 January – 31 March) and 2482 (1 April – 31 December) in the Buddhist Era. The name of the country was changed to Thailand this year.
