My mom didn't know, though she thought she may have heard it before, and she knows a lot about songs. It's probably a German song.
It sounds more like dialing-sounds for a very long phonenumber...
... of 1918 (a little too late for the 1900 theme).
I don't have it but my mom does and I know the song... this won't be helpful but.... Na NAH Na NAH na Naah na Na na na, Na NAH na NAH na Naah na Na na na,
the christmas organ has 3 christmas songs that it cycles through so ... that isnt it