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.
MSPO (Moscow Central Union of Consumers' Societies) was established in 1898. It gained significant membership throughout Imperial Russia after 1907. After reorganization by the Soviet government, MSPO became an association of unions and its name was changed to the Central Union of Consumers' Societies-- Tsentrosoiuz. In May 1921, Tsentrosoiuz became the single government agency responsible for distribution of wholesale consumer goods in the country.