Music Movement Sliding Stopper
Some deluxe wood music box will need the "music movement sliding stopper".
For example 30 note,50 note,78 note...the music duration is more than 4 minutes when the tune finished.
The "music movement sliding stopper" can stop the tune when the tune play once.
At the end of the tune, as the cylinder turns, a hole in the main gearwheel lines up to allow a lever to slot into it under spring tension which then pulls the lever towards the butterfly wheel to touch it to stop the movement from playing.
The lever comes in one length with 5 holes for the button thread to go through to help positioning. If necessary the lever can be cut & bent to lengthen the right angle section.