These are supposed to be an “A” grind which I was told was the same as the KHK.
My #3 is broader than the previously pictured KHK so I guess maybe it’s not an “A” grind and something else.
Back in ‘74…
We had a guy bring in a ‘56KHRM for a rebuild and it had “mushroom” cams. To a KHK owner they were “Holy Grail” stuff.
Just holding them was fascinating. He defaulted on his bill and the owner of the shop said I could have the cams in exchange for my good KHK set. The guy was waiting outside the shop when I opened up the next morning with payment in full. He got his motor with his cams. The shop went bankrupt 3 weeks later.