The top coin below is yet another example of a copper imitation of the
hyperpyron SBCV 2073 of
John III Vatatzes with a very unconvincing "gold" coating. It was sold by a well known
auction house earlier this year as the
hyperpyron, although how anyone can see this as gold (or even
electrum) is beyond me.
The second coin is another example from the same dies offered on
Ebay last year, and the third coin is an uncoated example from the same
reverse die.
Examples from the same
obverse die are common, and one is shown as the bottom coin here.
Ross G.