You might ask about the Grand Imperial on the forums over at antiqueradios.com. There is a member over there who worked for Andrea in the 50's and 60's.
Andrea was started by the same guy as FADA, Frank Angelo D'Andrea. FADA goes back to the earliest days of radio. Andrea dates back to the mid 30's. Andrea Radio was one of the earliest TV manufacturers, and their prewar model 1F5 is a holy grail set to many collectors. FADA also made TV sets. More FADA/Andrea history here:
http://classicradiogallery.com/fada_history.html
I don't have any Andrea sets. They're extremely uncommon out here in Washington State. I'll bet there are at least a couple 1F5 owners here on AK
John