YEMEN. Central Bank of Yemen. 500 & 1000 Rials, 2017. P-39s & 40s. Specimens. Uncirculated.2 pieces in lot. Specimens. A pair of scarcer modern Specimens for Yemens Central Bank. The 500 Rials shows with a mosque at center and Palace of the Rock on the reverse. The 1000 Rials shows the Palace in Sieyun on the face and Bab Al-Yamen Gate on the reverse. Red overprints on each side.