song?

That song must have been composed just for this movie. Usually, if you type in a search of any phrase of a song a lyrics page will come up giving the song title and other particulars. It shows the music composer as being Lennart Fors who died at age 51 in 1983. I spect he wrote the tune and it never made it outside of the movie. No doubt about it, that was good composing and singing. The song might have made a hit had it been made in the 40s or early 50s.