This was just plain old white vinegar (3%) so it was slow working anyway. I can get 30-40 grain (%) vinegar but safety equipment is required to avoid burns.
I read vinegar would remove rust and so put the coin in vinegar. After a bit life happened and the coin was left in the vinegar for a long time so I guess it would be considered cleaned now. Here are the before and after photos.
That leads me to ask the question, are the dies for each mint processed at the same place or independently? If processed at the same place, why the difference then?
Thanks all! I looked at my change with my old 2.5X loupe first and did not see this until I used a scope. Solves my wondering if I was missing things with the loupe.
What I have against it being an annealing issue is there isn't a smooth transition from copper to silver color. There is no way heat would travel as ragged as that edge line appears. Could be a thin plating.
The clickbait people search the large auctions houses for coins that sell for extreme amounts of money and then say you might find one in change. What they don't say is that coin has probably gone through many auctions over the years and if the seller is lucky, they might get 10% over what they initially bought it for. Do million dollar coins exist? Yes. Will you find one in pocket change? Extremely unlikely to definitely not. If it was found in pocket change, it would probably have high circulation wear and quite possibly damage significantly dropping the value.
That being said, there are opportunities to get worthwhile coins for cheap like the QDO 1967 half I found in an SMS set. By the way, about 3/4 of my collection is probably worth face value.
Here is the same area on a 2023 P ER quarter. I'm not disagreeing with Tanman but it was the differences that caught my eye. On the BC quarter there seems to be some damage that may be accentuating the relief in the hair.
I got this quarter in change. There are no listed DDOs for this quarter but the hair by the ear looks odd to me. The 3rd pic is a zoomed in view of the full obverse pic. The last 2 are different closeups.