Are they raised? If they are, they could be from die polishing. A woody, improper allow mixture, would not be raised or incuse.
OK - I would agree - now what caused that as a planchet is punched from a smooth and polished metal sheet?
On a second look. The striations seem to flow through all the devices, and, the devises also look sharp. One thing that gets me is that improper alloy mixes tend to flow in the same direction obv. and rev. These run opposite of each other.
Not that smooth, and not that polished. This would be an extreme example of die striations, but it's not out of the realm of believability for me. What I wouldn't give to get this one under my own camera. C-B-D, I'm waiting with bated breath for some of your recent stuff to reach the market. This one is among them.
#1 on my list would be alloy - i,e, wood grain. BTW, you will also notice that the lines are exactly parallel on both sides. I mean both the obverse and reverse run in identical directions. That may be possible for PMD, but very unlikely.
I The Coors Lights are always a little better at this Mile high altitude. @C-B-D I like the toning, in my collection I would pay 58 money for it.