The obverse of the coin in the upper part of the disc - the coat of arms of the USSR of the sample of 1956: the hammer and sickle on a globe, beneath the rising sun, at the top a five-pointed star; the sides of the ears of corn, tied with fifteen turns of the tape, the lower stage is much wider, symbolizes the RSFSR (the rest of the coils - the other republics). Under the coat of arms, nominal value: a large stylized number "1" under which the horizontal is the word "РУБЛЬ" At the sides the inscription "СССР" divided into two parts.
On the coin reverse at the top - the relief image of the combined flags of Bulgaria (left) and Soviet (right), under the flags of two hands in handshake somknuvshegosya below are arranged in a semicircle the inscription "ДРУЖБА НАВЕКИ" Along the bottom of the Kant - the stylized image of two Laurel branches, beneath them the date of issue of the coin - "1981". All along the rim there is a rim of raised dots.
The obverse and reverse of the coin features the speaker on the circumference of the piping.
Artist: V. A. Ermakov.
Sculptor: L. S. Kamilov.
Date of issue: July 1, 1981
Total circulation: 2 million pieces, of which 16 thousand of collectible coins performance proof. There is a remake in 1988 by LMD, with a circulation of 55 thousand (is execution proof and date on the edge "1988").
It is noteworthy that in Bulgaria was released on a coin of 1 Lev with the same images.
The friendship of the Russian and the Bulgarian people has historically caused not only a similar culture and language, but also common efforts in the fight against the Ottoman Empire. After the Second world war Bulgaria was in the Soviet zone of influence, which further strengthened its relationship with the Soviet Union. In 1958, created the Society of the Soviet-Bulgarian friendship. After the collapse of the Soviet Union Bulgaria joined the European Union, relations with Russia began to decrease, but nevertheless remain joint companies, forums.