To add a third option - there are early islamic imitations of byzantine coins, they were called Byzantine-ummayad coins. But the history shows that there are similarities within the Ayubbid coins of Saladin, so you will be close than ever in finding your coin. I hope this helps.
You are welcome, always!
Kind regards,
Stefan
Referee: Albanian cities, Khanate of Crimea, Croatian cities, Bavaria-Ingolstadt, Bavaria-Landshut, Duchy of Bavaria, Electorate of Bavaria, Kingdom
Melius est esse unum numero in villa, quam numerus duo in metropoli.
9:25 STEFANUS