Stuart,  According to Bowers' "Encyclopedia", in two different places,
the 15-3/4" Euphonion music boxes were just Polyphon boxes sold under
the Euphonion name.  I sent you pictures of two different boxes.  The
upright one is a 22-1/2" bell box and the other two pictures are of
a 14-1/2" bell box, but the hardware and the cases are very similar to
your machine.  According to Bowers, they are actually the same.

Here are some answers to some of your original questions.

> I am about to undertake a full restoration but I cannot find coloured
> photos or information about what it should look like, and I want to
> restore it faithfully to its original condition.

Have you restored one of these music boxes before?  If not, you should
be _very_ careful about taking it apart.  These machines aren't as
simple as they look and you can easily break something that will cost
a fair bundle to replace.

The star wheel assembly is a particular problem.  It appears that you
are not only missing the 5 star wheels but also a small piece of the
casting has broken off.  Just a warning: If you remove the star wheel
assembly to replace the star wheels or repair the broken casting, it
will be *very, very* difficult to get it back to the correct location.

> The glass in the door is red in colour and my wife thinks it is
> "cranberry glass".

It may be cranberry color but it bears no relation to the art glass
called 'cranberry glass'.  In fact, it is probably a replacement that
someone thought was elegant but it detracts from the originality of
the machine.  You should find some old glass and cut it to fit.

> The castings have feet which do not look like any others I have seen
> photos of.

Those ears are sort of strange.  On my Polyphon box the feet are just
rectangular but there are metal corners on the floor of the box to
position the motor so it has the same effect.

> There are no mounting holes in the side of the comb assembly to
> accept damper covers and dampers, and the position of the centre
> spindle is not common to other machines.

Yours looks a lot like Polyphon machines.  If so, the dampers are on
rails that screw to the bedplate.  In fact, it looks like your machine
actually does have its dampers.  Again, it is _very_ hard to get them
positioned correctly if you remove them.

> There are five starwheels missing from the top of the assembly,
> so I will need to find somewhere to get some more.

As I said above, be careful.  And the star wheel casting is very
brittle and breaks easily.  There's no easy way to repair it.

> I would like advice on removing the rust without loosing the image
> on the discs.

You'll have to experiment a bit but I'd suggest that you search out
a product called Evapo-rust, check at http://www.evapo-rust.com/ 

It will soak off the rust and it will not remove the lettering if you
don't leave the disk in it too long.  But try it first on these
particular disks.  It goes by another name in Europe but I don't know
about Australia.  Here is a supplier in Australia:

  Precision Specialty Tooling
  270 Raglan Street
  Preston VIC, Australia 3072
  http://www.pretooling.com.au/ 

Good luck with your restoration project.  If you haven't restored
a music box before, check out the recent discussions about how people
have learned to do it properly before you start.

Regards,
Craig Smith
Upstate New York, USA