Any chance this is a Shibata stylus? I'm guessing not, but as far as I know the cart it is for is usually only on the cheap Panasonic turntables with the built in CD-4 decoder. I have one of those in rough shape, and was considering getting it going again if I could do it cheaply enough. Otherwise I'll probably see if I can salvage the decoder and junk the rest.
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.ca/ulk/itm/264549975958
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.ca/ulk/itm/264549975958