The cabinet probably is a Farnsworth after all. I just looked at this site (for another post):
http://www.tvhistory.tv/1948-Farnswo...hure-SideB.JPG. Your set appears to be the "Contemporary 502P". Perhaps the chassis was not made by Jackson Industries? I don't see how it could have been, and been a capehart/farnsworth product. Were you able to do any more research? Could you post more photos.