A classic high-value definitive from the early Soviet RSFSR period, this 1923 20-ruble Worker stamp features the iconic engraved portrait of a proletarian laborer, depicted in strong linear shading. Issued during the post-Civil War inflationary era, these high denominations were printed in relatively modest quantities and are increasingly sought after for their historical and typographic significance. The deep reddish-brown color, bold “РСФСР” inscription, and vertical “1923” date make it a key representation of early Soviet philately. A must-have for collectors of Russian revolutionary-era issues, labor themes, and economic-transition period postal history.