This striking dark-blue imperforate stamp of Imperial Russia features the double-headed eagle of the Tsarist coat of arms beneath the Cyrillic inscription “Русская Почта” (Russian Post). Issued around 1917 during the final days of the Empire, it belongs to the last definitive series printed before the fall of the Romanov dynasty. The 10 kopeck denomination is known for its crisp ornamental frame and bold typographic style. Mint examples like this are prized by collectors for their historical significance, bridging Imperial and early revolutionary postal history.