Augustus, Tiberius or ... ?

Hello friends,
Happy Friday!
I recenthly aquired this coin, size about the same of a quarter, with an image of what looks like Augustus or maybe Tiberius.
I think I can spot the legend "Theos Serastus" and perhaps the image of Artemis, but still can't figure this one out.

Any id help with this one would be greatly appreciated.

Gratias tibi ago!

Monetarium

 

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Here is one very similar... listed as unknown mint.

https://www.acsearch.info/search.html?id=11089497

 

Thank you so much, Segestus! It looks like it is a rare one