This is a clamp type. Heavy but with a hole for the spindle that may be gasketed to exert pressure. It may be aluminum (zincated, then copper plated, then gold plated). If it's aluminum, it might also be weighted with inserts to add mass. Normally record weights are about .75-1 lb. in weight. Still trying to figure out how the top level turns into a continuous lookMost are heavy, some clamp on to the spindle.
This looks like it might be made of plastic. So is it a clamp type?
It picks up the tonearm at the end of the record using an added headshell appendage that rides the spiral ramp up. Ingenious!Thanks, Zoo. I once had a custom arm for a Thorens, but the weight was quite ordinary looking and would have been easy to model (just a few cylinders; the sound still was great). So I wanted really to know what the advantage is of such a spiral form, for example if that really minimizes resonance more than an ordinary one (really have never seen one like this).
(I don't have a record player anymore (and a cat destroyed almost all records I had). At my age I don't hear the difference between a cd and a record anymore. So it's just pure curiosity).