The circuit for the "Andrea" model 620 and 621 is identical in circuitry as you describe, but I have no images to reference to see if it is actually the very radio you posses.
I hope this is of some help to you.
: Still desperately need info on a wood table tube set that has only one decal at the top that says 'GENERAL'., It is a n am/sw & the dial is square & to the right-Spkr. to the left w/2 vertical grille bars-Tube line-up; 6A7,6D6,6Q7,25L6,25Z5, & an unmarked Ballast tube & a 6E5 tuning-eye tube at top-over-dial.,probably made in mid-late 30's to early 40's..REWARD of a nice working vintage transistor radio for the badly needed Model/Schematic info...thanks Duffy
: Still desperately need info on a wood table tube set that has only one decal at the top that says 'GENERAL'., It is a n am/sw & the dial is square & to the right-Spkr. to the left w/2 vertical grille bars-Tube line-up; 6A7,6D6,6Q7,25L6,25Z5, & an unmarked Ballast tube & a 6E5 tuning-eye tube at top-over-dial.,probably made in mid-late 30's to early 40's..REWARD of a nice working vintage transistor radio for the badly needed Model/Schematic info...thanks Duffy