Guinea-Bissau. Central Bank of Guinea-Bissau. 1990-1993 Issues. Date: 01-03-1990. Dimensions: 120 x 61.5 mm. Watermark: Amílcar Lopes da Costa Cabral. Material: Paper. Solid security thread with printed BCG. Flame registration device. Printer: Thomas De La Rue (TDLR), London, England. Multicolored front and back printing, predominantly red. Description of the front: Frame and background made up of small geometric patterns. Value "50" in the corners. Texts in Portuguese. Prefix and numbering in black. Pansau Na Isna (1938-1969) wearing a hat. Coat of arms of Guinea-Bissau. Maiame drum. Combination of signatures in black (Ministro-Governador and Vice-Governador): Pedro A. Godinho Gomes and Jose Lima Barber. Description of the back: Texts in Portuguese. Scene of brewing medicinal potions by a river. Replacement notes: Prefix AZ, BZ, CZ, DZ, ZA or ZZ.