20 Rials

Yemen's 1995 unification period saw the Central Bank issuing notes that had to function credibly across a population that had used two entirely separate currency systems — the Yemeni Rial of the north and the Yemeni Dinar of the south — since reunification in 1990. The 20 Rial denomination sat at the lower end of practical daily use, where counterfeiting pressure is typically highest and security investment lowest. De La Rue's specification here reflects that calculus: watermark only, no security thread.

Pick 25 runs through several date variants; authentication hinges on the watermark registration, which on genuine examples aligns tightly with the printed design field.