Yemen, al-Nasir Ahmad bin Yahya (Imam Ahmad) 1948-1962 AD. 1/16 Ahmadi Riyal, AH 1367, Year 1374 / 1955 AD, KM Y# 13, Silver 15 mm, weight ca. 1,75 g., Condition NGC MS 67, nice toned, beautiful specimen, highest NGC grade, only two coins in this grade, rare in this state of preservation!