I've followed this thread with interest!  Apologies if I missed it,
but has anyone mentioned the great film 'Operation Amsterdam,' the
1959 British suspense thriller starring Peter Finch, set in World
War II, and in which a street organ plays a prominent role?  It's
a great watch and the organ music is wonderful!

David Kelzenberg

P.S.: The 'Pierement Waltz,' composed specially for the film, can
be heard here over the film titles:

  https://www.youtube.com/watch?v=5l6aTDt6utc