This is a nice example of a Russian 5 Kopek Copper Coin dated 1776.
The obverse features the crowned monogram of Catherine II, Empress of Russia, dividing the date of issue 1776, inside a wreath.
On the reverse is the crowned double headed eagle, with the initials EM below for the Ekaterinburg Mint, and FIVE KOPEKS in cyrillic script.
Weighs 50g and measures 40 mm in diameter.