Everyone I've shown it to so far, including leading numismatists, think it's natural and very nice. You're the first person that's asked this.
I am always very sceptical regarding toning. It can easily been done by artificial means.
If leading numismatists think it's genuine toning...good for you.
Artificial toning certainly exists, but, from what I've seen, it's often unattractive, has no premium, and would not be slabbed as problem-free by TPGs.
And when the ease of creation is brought up, I'd love to see it done. Is there another one out there with this look?
Overall, toning is a very popular way to collect and can result in large premiums, grade bumps, and star ratings from the TPGs.