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 66, nice toned, beautiful specimen, second highest NGC grade, only two coins in this grade, rare in this state of preservation!