Olle Tallinger # WORD : IMAGE # 1982, nm
Onnasch # ASPECTS OF CONTEMPORARY ART# Macba, sealed
Oostende # JORIS MINNE #1970, nm
Oostende, Hasselt # LEON SPILLIAERT#ca. 1965, nm
Opalka ao, Budapest # GEOMETRIA ES METAFORA # 1988, nm+
Openluchtmuseum Middelheim, Antwerpen # TONY CRAGG # 1996, nm-
Orangerie des Tuileries # CHAIM SOUTINE # 1973, nm--
Orangerie des Tuileries # ROBERT DELAUNAY # 1976, nm
Orangerie des Tuileries, Paris # MAX ERNST # 1971, nm
Orangerie Koln # OTMAR ALT # includes 6 original seriegraphs, 1974, nm+
Orangerie Multiples Köln # BERROCAL # 1970, nm
Oscar Ghez # SCHILDERS VAN PARIJS #sealed copy
Oskar Kokoschka # Paradise # Mint, 1: 1
Ostende # l'Expressionisme FLAMAND # 1961, nm-
Osthaus Museum # VAN DE VELDE #1959, nm-
Otterlo Museum # BARRY LE VA # 1988, nm+
Otto Dix # ZWISCHEN DEN KRIEGEN # 1977, nm
Otto Neurath, ISOTYPE# AFTER NEURATH# poster, mint,2007
Otto Treuman # SCHILDERIJEN VAN HET RIJKSMUSEUM KROLLER-MULLER # 1970, nm-
Otto Treumann # JOODS HISTORISCH MUSEUM # 1956, nm