Yes Capn, you are right, there is better 2 dots than a single one : ? may be the end of a date? (1041), 1141, 1241 ??
According to the "folded copper sheets", I think that recently on WoC, it has been spoken about this technique used by few mints in Afghanistan (Qandahar mainly) but coins were struck and not and not cast; judging only from the scans, here we have the same for iranian coins.