Russia, Catherine II, Ruble 1766 - date overstriked

Very nice ruble of Catherine. Great details.

Date pierced.

Obverse: bust of the Tsarina to the right, mint mark СПБ below her, legend in the rim:
Б-М-ЕКАТЕРИНА-II-IМП-IСАМОД-ВСЕРОС;

Reverse: eagle of the Russian Empire, initials on the sides of the tail, in the rim legend:
1765/6 МОНЕТА - РУБЛЬ-;