The Phoenicians on the
West side of
Sicily imitated Syracusan coins. That is why you see Phoenician (Punic) coins with a goddess on one
side, and a
quadriga on the other.
Panormus (modern Palermo) is within the Phoenician sphere of influence, and so it could be from there, but not necessarily. The Kunker citation named another place (Kephal...?), but I imagine that nobody is that sure of it, some of these things are very obscure.
I don't doubt that the coin is Punic, it doesn't quite have the artistry of
Syracuse issues. Plus, I am sure that Kunker did their homework to the extent that these things are known.