TURKEY. Mahmud II, AH 1233-1255 / AD 1808-1839. 1/4 Zeri Mahbub (Gold, 13.5 mm, 0.79 g, 12 h), Qustantaniyya, AH 1223. Tughra. Rev. Mint and year. KM 605. Weakly struck, otherwise, good very fine.