Pablo Picasso (1881-1973) Painter at work observed by a nude model (H. de Balzac, Le Chef-d'œuvre inconnu, pl. VII, A. Vollard ed.). 1927-1931. Etching. 278 x 195. Bloch 89; Baer 130 c; Cramer 20. A very fine, fresh proof, one of 65 on japon nacré, unsigned. Two tiny russet spots on the upper edge of the folio. Full margins [327 x 251]. Edition of the book at 340 copies (plus 107 suites in separate editions).