I am not an expert, but, the Laboratory Model (C250) that I have has
the reproducer for the Diamond Disks.  I also have a reproducer that is
called a "Kent Attachment" that attaches to the horn and plays the thin
records.  I am not sure of the origin of this "Kent Attachment" but it
allows me to do exactly what you have described.

Paul Ward
psward@neo.rr.com