RUSSIAN EMPIRE, early 20th century Nicolas Cavalry School, founded in 1913. Metal and enamel badge. 1913-1917 period. No plate, no knob. Provenance : - Major General Dimitri Petrovitch SAZONOV, Attaman of the Don Cossacks. Born on October 28, 1868, in Kamenskaya, Don Host region, and died in exile on April 25, 1933, in Casablanca. - seller's great-grandfather.