I'm sure he has seen it I also figure Mike has seen it and if they knew they would have spoken up. I emailed Mr.Ken Potter I never heard back from him though I hope everyhting is o.k. with him?
I know that you have eyeballed the diameter in comparison to other quarters. Do you have a micrometer that will measure to 1/100 mm? I notice that sometimes it is difficult to tell difference visually. If you do not have one, do you have a quarter storage tube you could drop it in?
I have an early 20th century watchmaker's dial micrometer which I use quite frequently and have found it invaluable.
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