Possible possessor / holder: Zinckgraf, Galerie [nl] Role: art dealers Location: München [nl] Archival source: Archief SNK nr.762 Remarks: via Galerie Zinckgraf [nl]
Possible possessor / holder: Riedel (2) [nl] Role: collection Location: Bielefeld [nl] Archival source: Archief SNK nr.762
