Don't know if this matches. Wondering if it looks like this. It's an Admiral which would have been made by Continental.
http://antiqueradios.com/gallery/view_photo.php?set_albumName=Admiral&id=admiral2
I believe that 5 tube Admiral B125 would have a tube line up of 6A7, 6D6, 75, 42 and 80. There's no B125 listed in Rider's but there are two models that have that line up, the A31 and X8 under Continental. You might also want to check out those that have a 41 tube which is a sub for the 42. Those would be 5AZ,5G,5M,960-5X and 985-5Z Now a lot of their layouts don't match the above cabinet but they might be useful schematic wise.
If it's not that line up (6A7, 6D6, 75, 42,80) you should list the one you have and a photo if possible.
BR
Ken
http://radioatticarchives.com/images/a/Admiral_A-31_(1935)_Martin.jpg
And an M5125 Continental
http://radioatticarchives.com/images/c/Continental_M5125_(1935)_Fullmer.jpg
So I guess A-31 is your schematic. Which doesn't mean a thing if that's not the correct tube line-up or cabinet. 8o)
Ken