I was holding back on this one, as I am not a musical-box person,
though I have in my kitchen a small metal-cased musical box with three
well-known tunes on the barrel, workable but looking as though a car
has driven over it at some time, which I am reliably informed was
bought by my grandfather as a present for my grandmother in
Grindelwald, Switzerland, in 1891.

I had always thought "music box" was the American term.  Evidently this
is a simplification.

Dan Wilson