[ Robert Bartlett wrote in 220221 MMDigest:

> I am looking for some 21" Regina discs ...

Hi Robert! With close to 10,000 discs in stock, I do have plenty of
20-3/4-inch Regina discs. Email me for a list!

> ... for my recently obtained single-comb machine.

Regina didn't make single-comb 20-3/4" machines. There are always
two combs with one star wheel plucking each tooth, unlike other double
comb movements where one star wheel plucks two teeth opposite each
other. I hope this was just a typo, or you're missing an entire comb.
Send pictures!

Stay safe,
Nancy Fratti - Nancy Fratti Music Boxes
Canastota, New York, USA
http://www.nancyfrattimusicboxes.com/