oil on canvas Dimensions: 50,5 x 39,5 cm signed lower right "Ant. Procházka" verso dated and inscribed by pencil on the frame: Hlava III. verso on the frame old stamp: exhibited in Manes 1947 verso inscribed on old labels by author's hand: 1916, 87 verso lower a paper label on the frame: Österreichische Galerie Belvedere/ Künstler: Antonín Procházka/ Werk: Kopf III (Maske) / Inv.-Nr.Lg1617   Provenance: - collection of an Art historian and collector Dr Jaromír Pečírka, Prague - family collection of Dr Ivo Rotter, National Gallery Belvedere, Vienna (on long-term loan)   Exhibited.    Expertise by Professor Jaromir Zemina attached. Expertise by Dr Marcela Macharáčkova attached. The report of the restoration by academic painter Martin Martan attached. Consulted with Dr Karel Srp and Dr Jiri Machalicky. Confirmation of authenticity attached.