Take a short train trip from Amsterdam to Utrecht to visit
the "National Museum from Musical Clock to Street Organ":
http://www.museumspeelklok.nl/speelklok/uk/

Too bad you're not going to be around on Sunday.  Then you take
a short train trip to Haarlem to see the Haarlem Organ Museum
operated by Kunkels Organ Foundation:

http://www.anetherlandsattraction.com/netherlands-attractions-eh/haarlem-organ-museum.htm

Marc Kaufman