I have an 'orphan' interchangeable musical box cylinder, or rather
a sleeve, which I think is a 6-air cylinder from an Alexanda-type
box.  It has "A2 X1" stamped on both ends and "7A", which I take to
be the cylinder tunes identifier on the other end.  Length 6.5 inches,
diameter 1-5/8 inches.

I also have six or seven other cylinders, but these are _not_
inter-changeable.  If interested please contact me.

Kevin McElhone
Northants, UK