Just seen this direct message from NeonSlug which is extremely helpful, thank you!
I just registered my account 30 minutes ago so I can't post on the forum for 24 hours apparently. But I can read the inscriptions.
R:
لا اله الا الله
محمد رسول الله
….
This is the Shahada, boilerplate stuff. The line below it is unreadable.
L:
…قلاو
ـلطان الملك…
الدنيا والدين…
….
Qalaw… [Qalawun?]
…[S]ultan King
… of This World and of the Faith
…
I think this is a Mamluk coin from the Qalawunid dynasty.
Please post this as a reply on your own post