Maria Helena Vieira da Silva (Portuguese, 1908-1992) Earthenware; Leads. 1971. Lithography. The sheet: 345 x 430. Weelen 113 and 114. Printed in colors. Perfect proofs on japon nacré, numbered and signed in pencil. All margins. Edition at 150 proofs. Plates contained in a brown cloth portfolio with a label on the first plate, accompanying the 50 first copies of the book of Dora Vallier, Vieira da Silva, Paris, Weber, 1971 (enclosed work).