Here is an Alphason HR100s - MCS arm. I have had this 10 years and hardly used it! It’s in pretty decent condition, please see the images above. At some point it has had a rewire.
I spent some time fiddling with the anti skate. It took a while to find a material that worked, and I eventually settled on fine silk thread, which was the only thing that would go through the groove in the tiny wheel, but not kink up. Nylon monofilament wasn’t any good at any weight!
£550 + postage.