Here's an article about the Hoffman with a few more photos:
http://antiqueradio.org/Hoffman7M112Television.htm
If anyone has an ad showing this TV, that would be a nice addition to the article. I didn't find much about Hoffman online.
Thanks again to Jim for sending me the Sams manual!
Regards,
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html