Thanks
I have this information and most everything else on the web about these, the guitar I found seems to be something of an anomaly. As to the earlier comment, I would probably disagree - I already own a 1974 Matsumoku 'Casino'' and it is a brilliant player, thus my continued interest. It is worth noting that at this time 60% of the building process at Matsumoku was still done by hand, something the Japanese were much better at than the Americans at that time, although American craftsmanship has improved dramatically. It is true that sometimes the electronics on these are inferior, but mine and others I have heard sound just fine.
Here is a video link to a Matsumoku model - probably the date is wrong though as the Rivieras were not in production by Matsumoku from 1971-1975.
http://www.youtube.com/watch?v=JmEw4BXGFTM&feature=related -
this might in fact be a Casino, as they looked identical to the Matsumoku Rivieras with the exception of the absence of a center block inside, and they were built in 1974.
What I cannot find in my searching is pix of the labels of that era - the one on my Casino has fallen off, and most folks don't show them in their pride photos.