Began minting copper "Siberian" coins were planned to complement the silver coins in denomination of 10, 15 and 20 cents, but on the project it went.The obverse
depicts a simplified monogram of Catherine II, made up of letters "Е"(Catherine) and Roman numerals "II" Upstairs the Imperial crown. The sides two branches connected at the bottom with a bow.The reverse
depicts the emblem of the Siberian Kingdom - two Sables standing on hind legs, each of them with one paw holding the downward-facing arrow, and the other supports the crown. In a circle the inscription - "•МОНЕТА•ЦЕНА•20•КОПЕЕКЪ•" At the top of the year of issue "1764".
Photo from: www.altin-coin.ru
There is also a kind of portrait of Catherine II instead of a monogram.