Latin Rulers Of Thessalonica - Or Just A Squashed Nail?

I bought this coin, as well as a bunch of others with similarly unusual attributions* (I might post those too when my camera gets better), for the silly high money of $5-ish per coin, blindly trusting the dealer with the attributions.
So far, I found no reason to distrust the attributions either, but I've had at least three different people laugh at this particular coin with words along the lines of "it's just a squashed nail".

I think there's enough detail showing that it's clearly not just a squashed nail - but is there enough to suspect that the dealer attributed it correctly?

The size is about 25mm by 23mm, give or take - 30mm full diameter from one corner to another.

And yes, the photos suck. I know. But part of that really is the coin's awful quality.



Any ideas? It's clearly Byzantine (in hand it's obviously slightly scyphate, not sure how clear this is in the photos), but I don't know enough to guess past that reliably.


*) Empire of Thessalonica, Normans in Sicily, Ptolemaic, two Vandalic - those are the ones I doubt the most - and a thankfully cheap 1633 Prussian solidus that was at least obviously identifiable as such