Watch List notes:

TURKEY: Mahmud II, 1808-1839, AV ¼ surre altin (0.50g), Dar al-Khilafa, AH1223 year 16, KM-619, el-aliya series, lustrous bold strike, much rarer than the half or full surre altin coins, PCGS graded MS64, R, ex Kenneth A. Bovenmamp.

Estimate: 300-400 USD