Maurits Cornelis Escher
Hol en Bol (Convex and concave) (B. 399)
lithograph, 1955, on wove paper, signed in pencil and numbered 30/54III (editions of 44 and 54 copies are known), with margins, slightly mountstained, glued with the margins onto the passe-partout, few lesser defects, otherwise in good condition, framed
P. 275 x 335 mm.; S. 403 x 477 mm.