Reverse In the central part, an image of a fortress. Below is the year of mintage: 1818, framed by dots. Near the left and right edges is the letter 'L' - the mintmark of the Lima mint; on the right is the number: 1/4. Along the edge of the coin is a toothed relief pattern.
Obverse In the central part, a crowned lion passant. The edge of the coin features raised elements in the form of teeth.