RUSSIA. 10 Rubles, 1767/6-CNB. St. Petersburg Mint. Catherine II (the Great). NGC AU-53. Fr-129a; KM-C-79a (overdate not mentioned); Bit-15 var. (regular date). Overdate variety. Another issue with the final digit in the date clearly over a previous year, this overdate variety is not mentioned on the holder, but is a type recognized by NGC. A check of their census figures reveals that this would be just the third of its kind seen there, tied for the finest with one other. Lightly toned and evenly handled throughout.Read more about this item in our Coin of the Week blog post, <a href="https://www.stacksbowers.com/News/Pages/Blogs.aspx?ArticleID=german-princess-turned-russian-empress">here</a>.