Turn the clocks in Thailand back to 1939 and you'll find a country in the midst of transition. Just settling into its modern-day name (formerly Siam) and on the brink of the events of World War II, the country also got its first taste of Western music—thanks to Suntraporn and its bandleader Eua Sunthornsanan. There's no doubting the adventurous beauty of Thai-language jazz and big band that the group brought to the local music scene. Worlds collide within this time capsule of a playlist.