About #FX3 - 5 mark type 1979
German Democratic Republic. Foreign Trade Forum. 1979 Issues. Date: 1979. Dimensions: 120 x 54 mm. Watermark: Geometric pattern. Material: Paper. No security thread. Printer: Unknown. Multicolored front and back printing, predominantly green and brown. Description of the front: Background made up of guilloche patterns. Texts in German. Logo of the Forum "FH". Value "5" in the corners. Letters and 6-digit numbering in black. “FÜNF MARK” value in the center. No signature. Description of the back: Texts in German. Background composed of guilloche patterns. Value "5". Logo of the Forum "FH" and date. Replacement note with ZA or ZB prefix.