Watch List notes:

(g) Turkey, Ottoman, Mahmud II (1808-39), gold Surre Altin, 1.63g, Dar ul-Hilafe (Istanbul), AH1223 / 16, el-Aliye legend (KM 621), tiny edge flaw possibly from mount, about uncirculated.
Struck in Istanbul for taking on Hajj to Mecca. The term 'Surre' relates to the purse they were carried in.
Estimate: £80 - £100