Switzerland. Swiss National Bank (Schweizerische Nationalbank). Sixth issue (1976-1979). The note is issued on 04-10-1978. Permanently removed from circulation on 01-05-2000. Work of Ernst and Ursula Hiestand. Printer: Art Institute Orell Füssli AG, Zurich. Dimensions: 159 x 74 mm. Watermark: Portrait of Konrad Gessner. Security thread incorporated in the paper and visible by transparency. The SNB's translation texts are printed in green on both sides and in four languages: Romansh, French, German and Italian. Front and back: Multicolored print predominantly green. Front: in the foreground, a portrait of the Swiss naturalist "Konrad Gessner (1516-1565)" after a painting by the Swiss painter Tobias Stimmer (1539-1584). To the left of the portrait, under the value, is an animal from the title page of the "Thierbuch" (Historia Animalium), the most famous work written by Gessner. On the outside of the illustration, the three green dots in relief are intended to facilitate the recognition of the note by the blind. The value "50" is printed in large size in the left part of the thumbnail. This value is repeated smaller in the lower right corner. Eight issue dates and twelve signature variants with the Chairman of the Board and a member of the Executive Board. Back: composition in vertical. Both signatures are printed in green. The value "50" is printed roughly in the thumbnail representing an owl, a primrose and stars. The banknote number is repeated twice outside and inside the illustration and printed in black. The first two digits preceding the serial number letter indicate the date of issue. Known specimen perforated "SPECIMEN" in vertical, overprinted "SPECIMEN" in red and oblique on both sides. A three-digit specimen number is printed in black near the perforation. The banknote is still refundable until 01-05-2020. Other Reference: TBB (The Banknote Book): B339.
Signatures #48 : Brenno Galli / Leo Schürmann.
Signatures #50 : Brenno Galli / Fritz Leutwiler.
Signatures #51 : Brenno Galli / Pierre Languetin.
Signatures #52 : Edmund Wyss / Leo Schürmann.
Signatures #53 : Edmund Wyss / Pierre Languetin.
Signatures #54 : Edmund Wyss / Fritz Leutwiler.
Signatures #55 : Edmund Wyss / Markus Lusser.
Signatures #56 : Edmund Wyss / Hans Meyer.
Signatures #57 : François Schaller / Markus Lusser.
Signatures #58 : François Schaller / Pierre Languetin.
Signatures #59 : François Schaller / Hans Meyer.
Signatures #60 : François Schaller / Jean Zwahlen.