I spoke to a friend regarding this and he said he knows of two different EDWADVS varieties, one known from two obverse dies. He also said: "In other words, this mistake has been made three times! I wonder if it was the same person cutting the die each time, who couldn't spell the king's name" and that yours is is a variety of Withers type 30b reading +EDWADVS REX A. He has one of these from a different die to yours, as the initial cross is in a different position. He's very interested in this if you so choose to sell...