(Re: Christian's message about real Model M's)
I've got other Model M's with different part numbers--the Wang model
has "double" keycaps, each with an outer shell., presumably for easy
customization. They all say "Model M".
But to the point of "real" Model M's, have a look at the
clickykeyboard exhibits:
http://www.clickykeyboards.com/index.cfm/fa/categories.main/parentcat/
9230
There you have Model M's from early 1986. In every case, the label
on the underside identifies it clearly as "Model M". Perhaps only
the versions of this keyboard produced in the UK lack the
appellation.
For all I know, "Model M" in British English might refer to an off-
color(colour) joke and so was omitted. Or the person designing the
label for the UK model thought that "Model M" was unnecessary. But
all of the USA-made units that I've seen all say "Model M" on the
label.
Cheers,
Chuck