Tumbler made of transparent green glass, blown into a patinated copper mount with a perforated pattern. It has a cylindrical body with a raised base and a polished lip. The tumbler is in perfect condition. Driburg Crystal, designed by Volker Hundertmark, inspired by Karl Keudel. Metal mount by Toppe & Cosack, 1970s. Height: approx. 12.8 cm, diameter: approx. 7.5 cm. Lit.: Der Glasfreund, Zeitschrift für altes und neues Glas.