Patinated gypsum, adjusted in a cassette Dimensions: 21 x 21 cm (33,5 x 33,5 cm)  Signature undetected Verso stamp Provenance: the collection Jeanine et Raoul-Jean Moulin, number 565, Paris   Exhibited.  Publicated.   Consulted with Professor Jaromir Zemina and Dr Jiri Machalicky.  Confirmation of authenticity attached.