OTTOMAN EMPIRE: Bayezit II, 1481-1512, AV sultani (3.51g), Kostantiniye, AH886, A-1311.2, Pere-102, with the reverse formula sultan al-birrayn wa ..., which translates as "sultan of the two lands and khaqan of the two seas, the sultan, son of the sultan", bold VF, RRR. Extremely rare variety for Bayezit II. All examples on CoinArchives have the alternative reverse formula "darib al-nadr ...", and it is unrecorded by Damali, though published by Pere in 1968.
Estimate: 1,400-1,800 USD