Very nice stamp.
Yakov Mikhailovich Sverdlov (3 June 1885 – 16 March 1919) known by pseudonyms "Andrei", "Mikhalych", "Max", "Smirnov", "Permyakov"; was a Bolshevik party administrator and chairman of the All-Russian Central Executive Committee. Sverdlov was born in Nizhny Novgorod as Yakov Mikhailovich Sverdlov to Jewish parents Mikhail Izrailevich Sverdlov and Elizaveta Solomonova. His father was a politically active engraver who produced forged documents and stored arms for the revolutionary underground. The Sverdlov family had six children: two daughters (Sophia and Sara) and four sons (Zinovy, Yakov, Veniamin, and Lev). After his wife's death in 1900, Mikhail converted with his family to the Russian Orthodox Church, married Maria Aleksandrovna Kormiltseva, and had two more sons, Herman and Alexander. Yakov's eldest brother Zinovy was adopted by Maxim Gorky, who was a frequent guest at the house.