I seem to find only one one. Just looking at the
photograph, I can see
the set is of terrible quality. I'm now trying to source some
appropriate-sized pieces of camel bone.
'First catch your camel' :-)
There is of course no techncial reason why they can't be made for just
abotu any solid substance. Engraving a set on a suitable pile of metal
bars would be rather nice.
-tony