This goes back in my memory to the pale yellow Van den Hul speaker cables from the 80s which used stranded silver-plated copper. Man, they were etched with a golden sheen.
An old wives tale that silver is brighter than copper!
Copper vs. Silver tonearm wire
The subject of tonearm wire was touched on in a related thread on tonearms. Long standing friend rauliruegas strongly advocates silver. I tried it and switched back to copper. I need to re-wire my HW-40 and because my hands are getting shakey with age, must now delegate the task so I want to get it right. VPI told me today that their upscale wire, Nordost, used to be silver, but they switched back to copper because too many people found the silver to be too bright. That was exactly what my impression was when I last tried silver. Thoughts?