Robert
Tapehead
I've seen LP12/Ittok LVII with green Bias on!
I ran that for a while in the late 80s. A lovely Black ittok on a Rosewood LP12 no less
Worked fine and sounded very enjoyable.
The stylus used on the Bias back in the 80s was a small, nude stone with 5um scanning radius - the same as found on super elliptical, Vital and some other line tips.
Later this changed to 8um which is a regular elliptical.
Smoother, cleaner and fuller than the cheap AT based Linn carts of he day.
I still have it and it still works.