The National Museum`s conservation and preservation team completed the restoration of the Sinaw Hoard, the largest currency treasure unearthed in Oman to date. The treasure was found inside a pottery vessel in Shawwal 1399 AH/ September 1979 CE in Sinaw area in the Wilayat of al-Mudhaibi, Governorate of North a’Sharqiya. The glazed vessel is distinguished by turquoise blue and handles on both sides. (962) pieces of silver dirhams, dating from the early Sassanid and Islamic periods were found in the vessel.

The oldest dirham in the treasure dates to the reign of Hormuz IV – Khosrow ll (589-623 CE), more than 1400 years, while the most recent dirham in the treasure was struck during the reign of the Abbasid caliph al-Mu`tasim in the year (226 AH/840-841 CE).

The currencies of this treasure were minted in a number of an ancient Islamic capitals: Spain (Andalusia), North Africa (the Abbasid state), Egypt, Syria (Damascus), Iraq and the South Caucasus, the Arabian Peninsula, and Iran, which gives an overview of the role Oman played during the Umayyad and Abbasid periods.