Watch List notes:

'Abbasid Caliphate. Al-Amin (?). AH 193-199 / AD 809-813. Square bronze seal matrix (16.2mm, 2.54 g). Kufic inscription reading: la hawla wa la quwwata illa billah, la [...] mawla al-Amin . VF. Rare.

The final words read here as mawla al-Amin can also be interpreted as the more generic mawla al-amir.