If it's not conical, i wonder why @halcro said it's conical and even re-tipped his sample with Axel (to have Line Contact) ?
Chakster, there's no question that the FR-7F had a conical (spherical) tip.
Vinyl Engine even gives its diameter as 0.65mm.
My one came with its original tip sheared off but its circular base was highly visible.
I sent it to Dietrich Brakemeier (Dertonarm) (who has worked on dozens of them) and he sent it to Japan to be re-tipped by the Master who apparently did the originals.
It came back to me with a decidedly conical stylus which frankly.....did not set the world on fire 😪
When this new tip also mysteriously sheared off....I sent it to Axel who recommended replacing it with a Line Contact which I agreed to.
My new FR-7F/Lc now sounded superb...and if you check the specs against the FR-7Fz, the only difference appears to be Output Impedance of 2 Ohms against 5 Ohms.