The Famas brand appears to have been an in-house one for Farmers It appears in advertising during, and just after, WWII. It was not just used on radios and appears to have been a house brand used on products made specifically for them - for example, the brand was seen on boots as well:
Where the model code is not clearly stated it can be found (in most cases) as the letters at the start of the serial number. For example, RB10574 would be a model RB.
|Famas model EB
|5 + magic eye on some sets