To whom may not know , dealing with
Islamic coins ( from that era at least ) is a very hard job.
On probably 75% , The only key is the date .
Which is hard to read on low grade coin.
As example the number 3 in
writing and the number 6 in
writing are very close .
On low grade coins , some times it is impossible to tell , if 6 or 3.
and that is one one example ...
Sam