12-14 watts. Brown leatherette covered cabinet with two rectangular grill openings, G in center of grill crosspiece, and Gibson name to upper right of grill, leather handle. Cabinet measurements: 20 inches wide x 161/2 inches high x 71/2 deep. Weight: 22 lbs. One 12 inch Lennon Alnico 5 speaker (stamped P12R C5496 220427). Two channels with one 'microphone' and three 'instrument' inputs. Top mounted chassis with six tubes: 2 x 6BQ5; 2 x 12AU7, and 2 x 6EU7 (all dated 2-52). On/off switch; 2 amp fuse; 1 tone control; 2 volume controls.
This amp is in near mint condition and still has the original power cord and guitar cord, as well as the original canceled check/receipt.
The 1950 Gibson GA-20 was the first guitar amplifier to receive this new look. The cabinet was covered in brown leatherette "accented by a gold medallion".