Unknown artist, possibly Hans-Siebert von Heister

Unknown artist, possibly Hans-Siebert von Heister,“untitled“, 1920ies, oil on canvas on stretcher, 58 x 53cm.
Unknown artist, possibly Hans-Siebert von Heister (German 1888-1967), „untitled“, 1920ies, oil color on canvas on stretcher, on elder traditional painting, 58 x 53cm. Provenancefrom the workshop of the former Art Gallery Heinrich Picker, Gökerstraße, Wilhelmshaven.
