I picked these up at the 2107 Sturgis, MI AM Swapmeet, amidst a pack curious OMs. What a find! Jerry replaced the original transformer in the linear power supply with a new AL-811H transformer. The cosmetic condition of these relatively hard-to-find Gonsets is astonishing. There is one front panel scuff on the GSB-101, and a few inperfections in the cases (original paint). Because of the size and weight of these, coupled with shack real estate, Station C will need to be constructied.
These units date to about 1958, but will need to run down the serial numbers if possible for more information.