It's not the dual use of the audio power amplifier which is unusual, it is, as you say, absolutely normal. Some of those brands I have only ever seen on CB radios, but one or two of them were obviously household names which appeared on a wide range of consumer electronic goods. 'Pace' was certainly one of a number of brand names (like Cobra, President, Uniden, Sears, Midland, Stalker, Teaberry, Kraco, Royce, Lake, General Electric, Sharp and Realistic, to name just a few) which were familiar to CB radio followers in the late seventies / early eighties. The logos are not in the same font or style. You will be thinking of 'Pace' primarily on set top / satellite boxes, I think, but I'm not sure there is any connection between that Pace and this Pace. The PCB has the PACE logo and 'Pathcon INC.' etched in the track side of the PCB, but the radio and its microphone both have 'Made In Japan' on them - hardly surprising as all the better CB radios (and arguably most high quality consumer electronics) were made in Japan at that time, the mid seventies - early eighties. CB radios - old ones - have also been discussed here before from time to time.

PMR equipment, for example, is often discussed here. Although this area is titled 'Vintage Amateur and Military Radio', there seems to be a gentleman's agreement that it can be used for discussions about a broader range of historic radiocommunications equipment.

Pace 166 cb radio box