Again, I am very impressed about your job - thank you, Eugene, for the English version for people like me, not understanding much Russian.
As to the 1758 copper 5 Kopeks (EM) and (CM) I have this question left:-
Andrey (kaostram) explained the difference as the orb/scroll relation (cited at the beginning of this thread). There is also the eagle's right wing and the introverted "5" of 1758.
One of my 1759 coins also shows an introverted "5" and as far as we know there were no (CM) in 1759.
My concern is: What makes you believe that my 5 kopeks 1758 with the "bit out" wing is also (CM) mint? Is it the "5" alone?
Thank you again, Sigi