I have a Victoria Organette, German, 24-note, which plays book music.
There are four rubber drive rollers that need to be replaced.  Does
anyone have an example of this make of organette?  I need to know
accurately, measured with calipers, the diameter of the rubber rollers,
both:

1. Those integral to the organette itself, and
2. Those in the hold-down bar.

Many Thanks in advance,
Kevin McElhone