Hello, very cool coin. Surfaces are just beautiful. I think I might have a loose ID. If you flip it to a 45° axis (180° from what's pictured or upside-down) you've got most of a Theodosius II monogram. What's cut off, the 3 arms of the "E", looks like it would fit from what I can extrapolate from the wreath diameter. Only thing making me unsure is the palm in the field. I've seen that on another "Vandalic" imitation somewhere; I'll try & find it again & post if I do. Something like a mark of value...?
My 1st impression was a tiny imitation of a large "M" Follis of the Byzantines. Might be, there are certainly imitations that small of much larger coins. And it would sort of explain the palm in the field; an interpretation of the regal year that's in its place on official coins.
Old thread, I know, hope I'm talking to someone still there. If you've figured it out since posting, could you post the answer? Beautiful coin. I love those tiny 5th C. monograms. Thanks for sharing.