GLATTFELDER Hans Jorg (Zurigo, 1939 - ) PYR 409 1974 relief paint on pvc cm. 70 x 70 Confirmation of authencity by the artist dated 10/11/2018 Titled, sized, dated, signed "PYR 409, 70x70, 1974, Glattfelder"; stamp of the artist; stamp of the Galleria d'arte La Piramide, Florence (on the reverse) Private collection, Milan Galleria Rossovermiglio, Padua Guarneri collection, Florence Galleria La Piramide, Florence