USSR coin «The Soviet-Bulgarian friendship» 1 rub., 1981, copper-nickel alloy

Obverse: on top of the coat of arms of the USSR with 15 turns of ribbon on the left of the letter "SS" right "SR", below the designation of the coin denomination, the number "1" and below the word "RUBLE".

Reverse: in the upper part of the image of the state flags are: right, the Soviet Union, the left - UXO. at centre an image of a handshake, symbolizing the friendship of the Soviet and Bulgarian peoples, underneath the semicircle inscription "FRIENDSHIP FOREV