Watch List notes:

Timurid, Sulayman Mirza (936-992h), a Chaghatayid silver dinar of Dashmand Shah, Bukhara 74(7)h, countermarked 'adl sulayman badshah ghazi within ornate cartouche, 7.84g (cf SNAT XVa:321 [host coin]; cf SNAT XIVc:427 [countermark]; A 2465A var.). Host coin fine, countermark double-struck otherwise very fine, extremely rare.
The host coin pre-dates the countermark by approximately 200 years!

Estimate: £300-400