Natan Isaevich ALTMAN Portrait of Ballet Master Mende - 1927 Pencil on paper Signed in Cyrillic and dated lower centre "27". 33.5 x 20.5 cm Provenance: Sale London, Sotheby's, 29 March 1973, lot 5 Christophe Czwiklitzer Collection To the present owners by succession Exhibitions: Heidelberg, Heidelberger Kunstverein, Russische Malerei und Graphik des 20. Jahrhunderts: Ausstellungskatalog, July - September 1974, n°3 p.273, reproduced in black and white Pencil on paper; signed in Cyrillic and dated lower centre; 13 ¼ x 8 ⅛ in. Natan Isaevich ALTMAN 33.5 x 20.5 cm