Teodor, I understand your inclanation to think of this as mechanical. It does show well formed, bold and prominent pattern. Jeff also has a good point about the mechanical "swirls".
However, as pointed out by Lew, it displays some planar distortions, and what clearly appears to be a "ladder" formation, aka "Kirk Narduban" wootz pattern (and very attractive one
So, I am with Lew.
Let's see what others think...
My guess on age, and very distant one, would be late 18/early 19th Cent.