Unusual SME configuration


Hi,

I bought a turntable with an old SME tonearm and there is an adjustment device that I have never seen before. Any idea what is the purpose and how to adjust ?

 

Thanks

cbour02

 

Device for additional bearing loading?

Dynamic VTF?

Never seen that before. Can you adjust the spring? If yes what happens if you do?

Did you check with previous owner?

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