This is an excessively rare type in the style of late Habbarid coins of Ahmed and some coins of ‘Abdallah III. The inscription on the reverse is clearly “mansur” (or perhaps “al-mansur”) which means “victorious” and might be an epithet of the ruler. Alternatively the word could be referring to Caliph al-Hakim (996-1021 CE) whose given name was Mansur. The name on the obverse is only partially visible – it might be “(Ab)u Sharm” or “(Ab)u Sarah” or perhaps something else altogether. These coins were probably minted by Ahmed or ‘Abdallah III, although it is possible that they were struck by an ephemeral (and perhaps early Soomra) ruler whose (unread) name is given on the obverse. Only two other examples are known, pictured in Fishman/Todd, the type is rated there as RRRR.