I kind of fell into this amp by accident on Craigslist. I'll post pictures in the next day or so. What I know is that its a Rickenbacker from 1957 and is the Model M23 "Brilliante" with 3 Jensen P12R's. It's as big as a house and very loud. Right now it needs some work and I'm looking for a schematic but so far, I can't find anyone who has ever even seen one of these. I'm guessing it's kind of a Rickenbacker Bandmaster (5E7) with the 3 -10s. It has 3 channels-normal, bass and phono (RCA jacks under the panel).It appears to be all original with maybe a cap or 2 changed. Did I mention how big this thing is?

Here's where to find the photos are the photos

http://www.gtvnyc.com/OK guitars3/rickyscale.jpg
http://www.gtvnyc.com/OK guitars3/ricky small.jpg
http://www.gtvnyc.com/OK guitars3/rickypanel.jpg
http://www.gtvnyc.com/OK guitars3/speakers.jpg