In the center of the disc the indication of the denomination of the coin 10 RUBLES. Inside of the figure "0" – hidden pictures of the figure 10 and of the inscription RUB visible by turns on changing angle of vision. Along the rim circular inscriptions, on top BANK OF RUSSIA, on bottom the mint trade mark (SPMD) and the date 2013, to the left the stylized image of a laurel branch, to the right of the oak one.

The coat of arms of the town of Kozelsk, over it on a ribbon the semicircular inscription: CITIES OF MILITARY GLORY, below the inscription along the rim KOZELSK.

6 sections with 5 corrugations and 6 sections with 7 corrugations alternated with 12 smooth sections.

With the expansion of Russia’s borders throughout the 17th and 18th centuries, Kozelsk lost its military significance and slipped into obscurity in the shadow of the regional center of Kaluga. In 1776, during the reign of Catherine the Great, Kozelsk was granted a coat of arms comprised of a red background (the color of spilled blood) with four gold crosses (fidelity) and five silver shields with black crosses symbolizing sacrifice in defense of the country. This coat of arms gave eloquent testimony to the reputation of Kozelsk for bravery and endurance.