About #4 - 100 ouguiya type 1974
Mauritania. Central Bank of Mauritania. 1974-2002 Issues. Date: varieties. Dimensions: 145 x 70 mm. Watermark: bearded man. Material: paper. Various solid security threads. Printer: Giesecke & Devrient, Germany. Multicolored front and back printing with predominantly purple. Description of the front: frame and background made up of arabesques. Prefix and numbering in black. Texts in Arabic. "١٠٠" value in the corners. Eight signature combinations with the Treasurer General (unknown) and the Governor. Description of the back: musical instruments, a cow and the minaret of Chinguetti. Texts in French. Value "100" in the corners.