> The details I have for the box are:
> 	Motorola
> 	Model 8420
> 	Type	3400R

Hmm..  I have received a query from a gentleman in the UK with a 8120.
One of my mvme88k boxes lists its model number as 8220.  If you open
the front of your box, what do you see inside?

My front faceplate just pulls straight off (no screws).  Inside, I
have a board labelled MVME187.

Thanks,
-allen