This razor (which has no maker's marks anywhere on the steel or scale, but which does hone to a proper edge) didn't have these marks I've highlighted when I got it a couple of hours ago and put to convex stone. So the giant-diameter arc imparted by the first stone [soft ark] had to do some cutting in to the razor's concavity to get to the point where it could carve in to the bevel plane a complete version of its slightly curved and more acute-tipped arc from within the incumbent more-obtuse-tipped line. On an old razor that's well worn and using a flat whetstone, you might encounter something like this, but you'd just have some honing marks above the bevel plane and the bevel plane's edge itself would not be making contact. Then you'd apply tape to the spine (increasing the bevel angle) until you got the (taped)spine and the new (closer to spine) edge line paired such that both were flush to your stone without any metal in between them preventing that. Fascinating to me, I have never seen this before!