Comment by 2b3a51

Depends how well the turntable is decoupled from its plinth. Think in terms of a lumped systems model with a mass on a spring being driven by (probably lower frequency) vibrations from the speakers.

"Now that I think about it, there was nothing in this shop that would tell you it isn’t still, say, 1960."

I'd go for 1980s based on the amplifier, turntable and speakers. It would be a radiogram, probably valve based, in actual 1960s. Nice though.