[Arran]

Kirk, Jayce;
  Magnetic pickups tend to be the more reliable of the vintage ones, about the only things that fail are the rubber parts and the magnets getting weak, both are repairable. The Rochelle salt crystal cartridges are the worst, those seem to have an 80% or worse failure rate. As for the turntable platter and the tone arm there were only so many companies that manufactured generic ones, General Industries was one of the big ones for producing single speed generic record player parts, and record cutters, if Arvin used these parts someone else did too.
Regards
Arran