This paper presents a unique bronze weight manufactured by the order of a little-known son of [ain]Abd al-Malik, who was governor of Jund Filastîn for a short period. The weight, of the Byzantine disc type, but bearing Arabic inscriptions, was found in the excavations carried out by the Institute of Archaeology of the Hebrew University of Jerusalem in 1990. It is discussed here in the context of other metal weights of the period which bear Arabic inscriptions but are of Byzantine form, and which sometimes also bear Byzantine symbols and Greek inscriptions.