Very nice drawing with a real research of construction (it is perhaps for a sculpture).
The work dates from the 1920s, when his style is still cubistic.
Size of the drawing: 31.5 x 31.5 cm
Size with frame: 38 x 38 cm
Boris Korolev (1885-1963) XX century. Russian. born in Moscow.
Sculptor, designer, monumentalist. Avant-garde, Constructivist.
At the beginning of the 20th century, he studied science at Moscow University. He later moved on to painting, architecture and sculpture.
Museums: Moscow: (Tretyakov Gallery): Portrait of A. Jeliabov 1928 broze
Saint-Petersburg (Russian Museum): Figure of a standing woman 1915, bronze
Artist referenced on Artprice and in the Bénézit (see the last photo)