Watch List notes:

Ilkhan, Hulagu (1256-65), gold Dinar, 6.24g, date and mint off flan, but probably Baghdad, citing Mongke (A 2121.1), with Arabic number '64' engraved in obverse margin, flan a little bent, but about very fine, very rare.
For a similar coin see Zeno https://www.zeno.ru/showphoto.php?photo=262859
These coins resemble late Abbasid Dinars as they were struck soon after the Ilkhans defeated the last Abbasid caliph.
Estimate: £500 - £600