Although Ampico model B units were found only in grand pianos, a friend
of mine, who is a piano tuner, discovered a model B upright!  It is the
only one I have ever heard of.  Perhaps it was an experimental model,
or one built by an employee of the Ampico Corporation?

Has anyone else ever heard of a model B unit installed in an upright
piano?

It is my opinion that no one is an Ampico expert.  I have worked with
Ampico units for well over forty years, and still find variations in
construction, and design.  I think Mr. Stoddard was a busy man, always
seeing improvements, and making changes.

Bruce Clark