GVG tuners were in better B&W"s and most colors the E-line.
The flat chassis had a SS version. From E line on varactors took over
for a TOTL set. Zenith also built these.
I would guess yours was either the leader or a drop in model.
Probably dont have AFT or dial lites.
If you post the model ## I can look it up & see if anything else is
different.
73 Zeno
LFOD !