1922 Peace Dollar Error Coin?

pdmw,

The photograph makes the coin reverse appear it had been soldered at one time.Bright and shiny,
but that good be light reflection.
It also has some crackling in it that looks like a glue residue.
Then again it also looks like someone poured acid on it.
I could stare at that coin and think of other things it might be,but none of them would have to do with a mint error.
That said, more knowledgeable people will see the thread.
regards
coffeecup57

Thanks for your input, whatever is on the surface is not glue, it seems to be melted metal or something. I have done a silver acid scratch test from multiple parts of the coin and it appears to be silver. Tricky.