This is a wonderful miracle effect from the late Martin Breese! As you tell the story detailed in the patter, if you choose to do so you can make the box play its tune as you open and close the box. You can make the box play its music whenever you wish but when examined it is found to contain no music box parts whatsoever. Hand-crafted and completely under your control whether you are in the room or 100 yards away!
Unlike some similar effects I have seen this actually sounds exactly like a music box. Very effective and hard to find these days.
(Notice: Includes: Printed Instructions.)