. . . of a 1964 Silvertone roundie (table model) I had in the early '70s. Your TV's front control panel is very similar to mine, even down to the flip-down door in front of the contrast, tone, etc. controls below the color, tint and brightness controls. The only differences I could see, and they are very slight, are in the style of channel selector and volume knobs and the fact that your set has the illuminated channel window above the selector (mine had a white nameplate with "Silvertone|Color" in gold script lettering set into the space used in other models for the channel drum). The channel numbers on my set were originally on the selector knob itself, but when I got the set the numbers were pretty well worn off and the part of the knob they were on was so loose it moved every time I changed channels. Oh well. I lived in a Cleveland suburb at the time and knew where our three (at that time) network stations were on that set, even with no numbers on the knob. Didn't bother me a bit. I used that set three years, until the video-output tube socket broke out of its PC board.
The gold insert you mentioned is probably a cover for a hole used to mount a UHF tuner in certain models of this chassis. Many TVs, b&w and color, of early '60s vintage had this kind of knockout cover, usually located below or near the VHF tuner, behind which was a bracket with a hole designed for mounting of a factory UHF tuner; the tuner itself had an RCA phono plug input jack for the output of the factory tuner, which was activated when the VHF channel selector was set to the UHF position between channels 2 and 13. I've seen this in several RCAs, Sylvanias and other TVs of that vintage although the factory UHF adapter kits are very difficult to find, if you can find them at all (there may, however, be a few on ebay); better just to use a UHF converter or a cable box for all-channel reception on these oldies.