Would say they are the Sansui SS-10 model, originally I thought maybe SS-20 or other one but but SS-20 had two upright dials on each cup. I see there's a volume dial to the bottom there in the black spot ( the brighter reflection part ), and here is confirmation on that. So that's my closest guess. Time period is bang on too.
Even the cable into the cup entry point is bang on. They'll be a two way driver setup , 2 speakers in each cup with a crossover.
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