I've just discovered two frames (one grip size 4, white buttcap; the other grip size 5, green buttcap), both strung in gut and still with their original black leather Yonex grips - and I also have their original covers. Both frames are used - the last rackets I bought and played with before I gave up tennis for 25 years, so they must date from c. 1980. I have googled the model (and the green 8500 - I played one of those also, around that time) but found surprisingly little about them, even on the Yonex history site. Does anyone know when they were launched / discontinued, and any major players who used them - and won slams or other major tournaments with them? Off memory, I think Tony Roche used a green 8500 - any others? Thanks!