Romain De Tirtoff 'Erté' (Russian/French, 1892-1990)

Romain De Tirtoff 'Erté' (Russian/French, 1892-1990)
Dessins pour La Traviata: Annette; and Georges d'Orbel
each signed 'Erté' (lower right), inscribed as title and numbered with studio stamp '9931' and '4.351' (respectively, on the reverse)
bodycolour on grey paper, unframed
15 x 11 ¼ in. (38 x 28.5 cm.); and similar
(2)a pair