He had trained as a theoretical physicist, but later worked as a patent lawyer and also followed a career as an artist. His true passion was glass.
For the best part of the last year, the collection was on show at the Glass Museum in Duesseldorf. On October 24, collectors and dealers will have a chance to purchase one of his prize pieces at the Dr Fischer sale in Heilbronn.
Among them is this 11in (28cm) high goblet with a green foot and bowl, decorated with hunting subjects, made in the late 17th century by Johann Wolfgang Schmidt, who was one of the most talented engravers working in Nuremberg at that time. The guide is €25,000.