Ed: Since you know the maker names, you can try entering the tube line-up at: http://www.grillecloth.com/sylvania/tubelist.php
and see what models they list. Then check out the schematics for the models listed on this site, and see if you have a match.
Steve
Ed, Is there a chassis number or catalog number? And what are the tubes? And post a picture. And check Radio Attic for picture.
Bill