This coin is an anonymous nummi which is most likely late Vandalic or contemporary with the reign of Justinian I, so circa A.D. 450. This date is corroborated by hoard evidence. It is probably best classified as pseudo-imperial, as it is not certain if it was officially issued and they usually have no legend or are illegible.
Here is a good article about these coins-
https://www.academia.edu/2904771/From_Carthage_to_the_Holy_Land_the_Palm_Tree_NummusVandals
Pseudo-Imperial coinage
circa A.D. 450
9mm 0.7gm
OBV: laureate, draped and cuirassed bust right.
REV: Palm tree with dates.
Wroth 68-72
