There are two tunes featured in the film "Operation Amsterdam":
"Pierement Waltz" and "Amsterdam Polka".  These were both released on
a 45 rpm record by Melodisc which, I seem to recall, was only available
by mail order and was encapsulated in a nondescript brown paper sleeve.

The organ on the soundtrack is "De Cello" and, in response to a query
by myself, Rein Schenk posted a very interesting reply in MMD of
030325.  A picture of the organ can be found in the book "Draaiorgels"
by the late Romke De Waard.

Best Wishes
Bernard Harris