Algeria. French administration. Bank of Algeria. Period of emission: 1918 to 1942. Date of creation: 02-01-1914. Work of Duval and engraving of Romagnol. Dimensions: 163 x 105 mm. Watermark: Moorish woman profile in a large medallion. In a small medallion above: Arabic inscription in a crescent.Front and back: Polychrome print predominantly purple and blue. Description of the front: background composed of arabesques in repetition. The signatures, numbering and date of issue are printed in black. The wording of the issuing institute "BANQUE DE L'ALGÉRIE", the value "VINGT FRANCS" and the date of issue are printed in purple in the center. On the right in a decorated medallion, the portrait of an Algerian woman in traditional costume. Four variants of signatures are known with The Principal Cashier and The Secretary General. At the bottom, the value "20" and article 139 of the Penal Code are printed in light blue. Description of the back: frame decorated with arabic motifs with an inscription in Arabic in a pediment at the top. In the middle, two young boys, one kneeling and the other standing, frame a yellow medallion with decorated rhombus and containing the value "20" printed in dark purple. In the background, a prickly pear and a dwarf palm. The specimen is known overprinted "SPECIMEN" in red on the watermarks in vertical left on the front. The note is watermarked, signed Penalva / Moyse, dated "0-2-1296" but not numbered. The same specimen is known numbered "0.000 - 000". Another specimen numbered "0.0000 - 000" and overprinted "CANCELED". A last specimen is known overprinted "SPECIMEN" in red on the watermarks in vertical left on the front, signed Penalva / Moyse, dated "39-8-9251" and numbered "0.0000 - 000". A large proof, undated, unsigned, unnumbered is signed with the signatures of Romagnol and Maillard. The note dated 1920 is known to 13 copies (Source: F. Virecoulon).