GE P-4 Turntable

[If 10.7]

I have a P-4 Turntable that is part of a GE Musaphonic model 44 console circa 1948.
I believe it uses an early GE variable reluctance cartridge , possibly a RPX 040.
Can anybody tell me if this is indeed the cartridge ,and where I could find a replacement cartridge or stylus
Thanks for your help

 

[KentTeffeteller]

That early RPX may not have a user replaceable stylus in the later GE mold. The earliest GE RPX model did not. May need to be a retip.