Chakster, the cartridges on jukeboxes were quite visible, and that brush on the end of the Pickering cartridge was unforgettable.
The jukeboxes I'm talking about were in sophisticated lounges that also featured live entertainment. The same professionals that installed sound systems in high end salons, also installed them in these lounges. Evidently you have no idea how important the sound system and music was to a lounge.
These were among the cartridges they used;
https://www.google.com/search?q=pickering+xv-15+625e&tbm=isch&source=iu&ictx=1&fir=6...: