Wow! Sunopera. It certainly sounds like you have an extensive knowledge of metallurgy, would that be a fair assessment?
However in my most humble opinion, I would say from what
Bill in Burl said in his assessment, he’s the man .
Bill you get a Wow! too. I'm humbled by your knowledge kind Sir and will not question it, also would like to refer to you if I should have more questions in the future, if I may? Glad I read your post
.
But, I do have a couple of theory's
(let’s call it an exercise in thought) as to how Chemistry might have had a role in the colour.
Unintentionally!Two things (1) that judging by its wear, it was well circulated, but a nice (VF). I suspect! So it has been out there for a will, sat for a will, then in someone’s pocket rubbed around for a bit, then lost into the floor crack and again who knows maybe a kid back in the day gave it a
spit and a rub spit has acid, as Bill in Burl said,
“been cleaned”. (2)You said you found it in the old floor. Well back in those days it was common to us an old mop and us allot of possibly varieties of cleaners and combinations, back then what was domestic?, was whatever did the job and didn’t kill you
on-the-spot, to clean the floor and probably used allot or even spilled buckets worth, then seeping through, coming in contact with the coin to give it, its colour!
Witch I think is real purdy and sat, over all these many years waiting for you to find it.
Just a theory!
I welcome enlightenment if needed.
I was hopping for you Sunopera but the W9 really gives it away, in my eyes was not clear enough before but with the new picture it is clearly not a
Narrow 9 Brass as far as I know no Brass were made Wide 9.
Still a nice find! I look in cracks whenever I have a chance.