Hello,
I have a little problem with the Bitkin.
In the introduction, page XII, Bitkin wrote :
"This book uses the same system of group indication that Chr. Giel used in this works"
and
"Number inside these symbols indicates a group of a coin (per conventional number introduced by Chr. Giel)."
I do not have the books of mister Chr. Giel.
Where I can find this system of group ?
PS(I do not speak or read Russian lol)
Thanks