Guinea-Bissau. National Bank of Guinea-Bissau. 1978-1984 Issues. Date: 28-02-1983. Dimensions: 154 x 66 mm. Watermark: Amílcar Lopes da Costa Cabral. Material: Paper. Solid security thread. Printer: Thomas De La Rue (TDLR), London, England. Multicolored front and back printing, predominantly dark blue and purple. Description of the front: Frame and background made up of small geometric patterns. Texts in Portuguese. Prefix and numbering in black. Costumed portrait of the first Prime Minister of Guinea-Bissau, Francisco Mendes (1939-1978). Coat of arms of Guinea-Bissau. Two ancestral totems representing a naked woman and a man. Signatures in black: Pedro A. Godinho Gomes, Vitor Freire Monteiro and Vitor Saude Maria. Description of the back: Texts in Portuguese. Dramatic scene of the boarding of slaves on sailboats bound for the Americas. Replacement notes: Prefix Z/1.