Art connoisseur, with a gallery in Koeln, specialising in the works of Picasso.

I have tentatively proposed that he is a son of Rudolf and Helene on the basis that the 1939 census of Berlin shows Christoph and Helene living together, and his given name indicates that he is, like Helene and unlike the Czwiklitzer origins, Christian rather than Jewish. Christoph was born in Helene's home city of Breslau.