The artist's name on the poster is not indicated. By assigning Artist Unknown to a poster it also could mean the artist used a chop mark whereby no signature is seen thus rendering the artist's identity anonymous.
Tambov is a city in Southwest Russia
The State Publishing House had its origins in Imperial Russia as the Royal Print Yard in St. Petersburg. As the Red Army controlled more provinces and cities in former Imperial Russia, the State Publishing House developed offices outside St. Petersburg. Tambov is a region as well as a city south of Moscow. During the Russian Civil War, the region witnessed the Tambov Rebellion (1920–1921) whereby local residents rose-up against the Bolshevik Red Army.