[codefox1]

To clarify, there are many ceramic/crystal subs that can be used on vintage changers, but some of the later magnetic cartridges required much less tracking force, had different stylus dimensions, and would not always be otherwise suitable, as in needing preamps. Mid 50's stuff was just turning the corner in phono technology solidly into "microgroove" stuff. Tons of reeading on internet if you are interested. Stereo was next! Quad was stillborn.

Agree, contact specialists as stated above or make inquiries in classified inquiries to get something what will make the best of your equipment and records. You may want to make two "piles" of your records, those to play on vintage equipment, and those preserved for updated equipment.