6331046 Cover of Sergei Chekhonin\'s sketchbook, 1928-30 (leather) by Chekhonin, Sergei Vasil\'evich (1878-1936); 17.4x10.5 cm; Private Collection; (add.info.: Sketchbook with the artist\'s monogram on the front cover and comprising twenty one studies of birds, cityscapes, landscapes, portraits and various designs including preparatory designs for a program cover for Vera Nemtchinova\'s Ballet Russes at the The璽tre des Champs-?lysees, Paris, 1930 and an enamel plaque (lot 15 in the present sale) \'Ch璽teau de Bagatelle\' signed, inscribed and dated \'Parva sed apta\' (lower centre) and \'S. Tchekhonine/1928.\' (lower right) pencil, watercolour and gouache, some heightened with gold, on paper; some with colour notes); Photo by Christie\'s Images.