So, I'm trying to use your formula you taught me. And I was wondering if you would be willing to check my work?
I was looking at a 1940 six pence on ebay. The item # is 122382859421.
The surface looks great, but it has zero luster, and the eye appeal is nothe there. But like most post 1900 coins it has a fine strike.
So, with 2 of the 4 bases covered, do you think a coin like this would come out a 65?
If you get time please take a look and tell me if I'm understanding things a little better.