Watch List notes:

Great Seljuq, Barkiyaruq (486-498h), Dinar, Madinat al-Salam 490h, with kunya Mu'izz al-dawla, 2.62g (Jafar S.MS.490 var.; A 1682.1). Margins partly flat, otherwise very fine, rare.
Jafar (p.39) states that Barkiyaruq's kunya changed from Mu'izz al-dawla to 'Adud al-dawla in the year 488h; this coin is therefore likely to have been struck from an old reverse die.

Estimate: £200-250