Two questions related to graphotype/addressograph plates:

Does anyone sell (or know who sells) new-old-stock Addressograph
plates? That is, I'm interested in the actual Addressograph plates
for embossing type on a Graphotype and printing on an Addressograph,
not in blanks for debossing dogtags.

More generally, what are the general specifications/requirements
for Addressograph/Graphotype plates? The Graphotype Reference Manual
is quite clear that the plate itself is important for protecting
the dies/punches. The few unused plates that came with my
machines were simply marked "Alloy B." What materials were used
for the plates? What thicknesses? What hardness conditions?
What experiences have people had with substitute materials
in making their own plates and/or dogtag blanks (which would seem
to have similar requirements - or not?). Any information at all
would be welcome!

Regards,
David M.
dmm at lemur dot com