[Patrick]

Can someone explain this? Does the screw on the spider limit the movement of the voice coil?

[Image: https://i.imgur.com/PieaQRW.jpg]

[EdHolland]

Could it be part of a repair, where that particular part just happened to fit the bill?

[RodB]

It appears that someone used a panel control label as a washer. The screw is to allow the voice coil to be centered around the magnetic pole. Can't see how a mechanical fastener would have any connection to vc current. Maybe someone else will have more to say. Maybe the screw kept coming loose from all the bass notes.

[morzh]

Yeah that's what I think. A piece of something just fit.

[Patrick]

So, it looks like the consensus is a broken spider. I went ahead and bought the speaker, so I'll know more when I get it. Might be able to replace the spider without reconing, I hope. Or maybe do nothing if it works the was it is. Seller says field coil is O.K.

I thought maybe this might have been one of those rare engineering experiments.