About #FX4 - 10 mark type 1979
German Democratic Republic. Foreign Trade Forum. 1979 Issues. Date: 1979. Dimensions: 124 x 56 mm. Watermark: Geometric pattern. Material: Paper. No security thread. Printer: Unknown. Multicolored front and back printing, predominantly green and blue. Description of the front: Background made up of guilloche patterns. Texts in German. Logo of the Forum "FH". Value "10" in the corners. Letters and 6-digit numbering in black. “ZEHN MARK” value in the center. No signature. Description of the back: Texts in German. Background composed of guilloche patterns. Value "10". Logo of the Forum "FH" and date. Replacement note with ZA or ZB prefix.