First interpretation: weight. A rough square, stamped B (?) on one side; on the other traces of decoration. Turkish (?) ADDENDA, 20 July 1948: Clipped Turkish coin. Turned over to coin department with ... 1 April 1936
The Athenian Agora; Volume 9; The Islamic Coins ... Agora 9 i
Agora 9 ii
Agora 9 iii