[1960s] Nederlandse Informele Groep/Schoonhoven, 1958-1967 Large lot comprising 1 pamphlet and 9 group show announcements featuring members of the Dutch Informal Group including Schoonhoven, Peeters, Armando, and 7 items related to Jan Schoonhoven. Incl.: (1) Bekendmaking, 1960. Flyer produced by the Nederlandse Informele Groep, 1960, printed black on orange paper. (2) Group show announcements: Punt 31 Dordrecht 1958; Besiendershuis Nijmegen/Galerie CCC Schiedam 1959; Orez The Hague 1960; Palais des Beaux Arts Brussels, Galerie Delta Rotterdam, 't Venster Rotterdam 1962; La Cavana Galleria Trieste Italy, small folded poster, 1963; De Baak Noordwijk, Orez The Hague 1966. (3) Schoonhoven ephmera. Includes 2 b/w photographs of a drawing from 1965, both stamped on rear 'copyright Ad Petersen Amsterdam', 17 x 16.5 cm, with handwritten printing instructions. Exhibition announcements: Galerie aujourd'hui Brussels 1962; Galerie Delta Rotterdam 1964; Orez The Hague 1967; Fold-out catalogue and invitation card for Schoonhoven's exhibition at the Haags Gemeentemuseum, The Hague 1967. (total 17)