Tobis and his Gauchos

"Tobis and his Gauchos - led by singer and guitar player Torvald "Tobis" Tollgren (1910-86) - could be described as the first Swedish latino pop group. During the 1940s and early 1950s, Tobis and his Gauchos was very popular with their (in the eyes and ears of the Swedes) exotic and colourful music. They lad lots of tangos, rhumbas and (as in this case) sambas and even a couple of hillbilly numbers on their repertoir and made over fifty 78 rpm records 1940-53. Tobis formed his group in 1938 and disbanded the group in 1956. Torvald Tollgren later worked as a manufacturer of ballet shoes." mp3 here
 

Update: I was remiss in not crediting my source: http://the78rpmblog.blogspot.com/