Could somebody please help me identify this board?

[Chris Pye]

>> 
> Hey, just checking - I think the puzzle has already been solved twice. I mentioned that I was pretty sure it's a Compugraphics board, and someone else said the same thing a few days later, but neither of those posts received any replies.
> 
> 
> Cheers,
> 
> Mike
> 

I guessing that is correct, but still have no idea what system it was intended for.