Ancient coin I found at work, Byzantine or Crusader? Unsure

I was hoping someone might be able to help me identify this coin I found while at work.

u/Macs_Money — 15 hours ago

Odd Alabama note, not sure of authenticity

I got this bad boy from a vendor at my work, I trust the vendor but I am unsure if this note is authentic or not, something about it just feels off. Any tips on its validity?

u/Macs_Money — 19 days ago