Hello,  Jem Whitenack wrote in 130507 MMDigest:

> I have a selection of 13-1/4" Kalliope discs for sale.

Please note that Kalliope discs of 33.7 cm (or 13-1/4") are found
with two different center hole diameters.

In Germany one usually finds the table model, which is wound up
through the disc centre, but I once bought by mistake five discs with
a smaller hole.  These were printed in English, "Made in Saxony".
Meanwhile, I sold most of my disc boxes so I can't tell you the two
diameters.

With a taper reamer it should be possible to make the hole bigger
without leaving the centering of the projection-tracks, but I didn't
want to alter original discs and so I sold them to someone who needed
them as they were.

Best regards,
Germar Schrimpf