Watch List notes:

ISLAMIC COINS, SAFAVID, Isma'il I (907-930h), Broad Silver Shahi, Balkh, no date, 9.43g (A 2576). Fine and rare.
First silver standard, (SNAT XIVc:904). This coin must have been struck sometime between 917h (when Balkh came under Safavid control) and 924h (when the new weight standard was introduced).

Estimate: £40-60