Federal Republic of Germany. Deutsche Bundesbank. 1970-1980 Issues. 20 Deutsche Mark Type 1970. Black and green on multicolor underprint. Dimensions: 140 x 70 mm. Watermark: Elsbeth Tucher. Front: German text. Prefix letter and 7-digit banknote number are printed in red. Portrait of Elsbeth Tucher by the artist Albrecht Dürer. Three variants of signatures. Back: Bundesbank logo. Clarinet, violin and bow. Background with the value in rosette, guilloche and weavy lines patterns. Solid security thread. Printer: Giesecke & Devrient. Material: Paper. Replacement notes: Prefix begins by Z.