The State Emblem of the Soviet Union (fourth version, 1956–1991), commemorative dates and text "50 years of Soviet power".

The State Emblem of the Soviet Union is composed of a sickle and a hammer on a globe depicted in the rays of the sun and framed by ears of wheat wrapped around a ribbon with 15 turns. At the top of the Emblem is a five-pointed star.

Aurora cruiser with blazing searchlight forward, firing bow gun. Denomination "20 Kopecks".

Aurora is a 1900 Russian protected cruiser built in St. Petersburg for service in the Pacific. Aurora survived the Battle of Tsushima of the Russo-Japanese War and was interned under US protection in the Philippines, eventually returned to the Baltic Fleet. During World War I Aurora operated in the Baltic Sea performing patrols and shore bombardment tasks. At the end of 1916, she was moved to Petrograd (the renamed St. Petersburg) for a major repair. The city was brimming with revolutionary ferment and part of her crew joined the 1917 February Revolution. At 9.45 p.m on 25 October 1917 (O.S.) a blank shot from her forecastle gun signalled the start of the assault on the Winter Palace, which was to be the beginning of the October Revolution.

After extensive repairs from 1945 to 1947, Aurora was permanently anchored on the Neva in Leningrad (now St. Petersburg again) as a monument to the Great October Socialist Revolution. In 1957 she became a museum-ship. On 22 February 1968 she was awarded the Order of the October Revolution, whose badge portrays Aurora herself.