Nice photo !
All Beomaster 700K's are mono. They were only made in
one-speaker versions.
Beomaster 700K only has one amplifier where the 900 has two.
It was also available with a protruding front (where yours
is flush)
and with darker grey plastic framing (where yours
is lighter grey).
The Beomaster 900 came in both versions too, and as 900M
with no built-in speakers and 900K with two speakers.
There are differencies inside as well.
The dial lettering is on the inside of the perspex.
You can polish the outside as much as you like.
Even the inside with the lettering will take a bit
of polishing but of course not as much as the outside.
If everything fails, I may be able to find a replacement dial.
They are wonderful radios.
Martin