Purchased 5 Gold Byzantine Coins...

Hi All,

I mentioned a week or so ago I was looking at purchasing 5 Gold Byz' Coins.

I closed the deal finally yesterday, I paid £1015 Delivered for the 5.
I have weighted all, 1 came out 4.3, the rest 4.4
I have no reason to doubt the authenticity, they look, feel and weigh real. Is there any other checks I can do? or any other opinions about the authenticity?

Below are the pictures. in order. I would appreciate any views on them, and more so, any information for the history/ identifying specifically.

Also, It appears I have 2 duplicates, which I would like to sell the worst of both, so could I have opinions on grade, and which of the duplicates look the better for keeping?

Values, I think they are all $300-400? please let me know if anyone disagrees?

Grade, I think they would all fit into VF? from my brief read up on grading Roman coins, again, happy for any views:

Ok, coin 1 (my favourite :):








Coin 2:




Coin 3:





Coin 4:





Coin 5:




Thanks all