Help Identifying This Midevil Coin

I agree Edward I penny.

I'd hate to correct you, but I am afraid this isn't a 10ab4. You are absolutely correct that 10ab4 can be recognised by an unusual abbreviation of the king's name, EDWR. But I am afraid that this isn't the case on this coin. We do indeed see EDWR. on this coin, but we must keep in mind that the entire, unabbreviated legend would read: EDWARDVS REX ANGLIE DOMINVS HYBERNIE. The R we therefore see, is an abbreviation for REX, not part of the kings name. On 10ab4 coins, where the king's name is indeed EDWR, you would read two R's (EDWR R ANGL.), while here, like on almost all coins, a single R can be observed. Another check would be the side fleurs; they are trifoliate, hence it is a pre-class 10 (they changed it in between classes 9 and 10).

Instead we must focus on something else for the identification. We can clearly see a star on the breast of the king, which is a sign we are dealing with a class 9 penny. Class 9 can be subdivided into three groups (four actually, depending on your way of dealing with mules). Due to it being London mint, we can immediately cross of class 9C (including the sub-class 10x, which is often used; look at the shape of the letter I on the rev.). This is where it gets slightly more difficult, particularly due to the fact that both 9a and 9b can both be divided into two sub-classes of their own. 9b2 can easily eliminated; the right fleur is definitely not straight. 9a1 can also be eliminated on the basis of the crown; the central fleur is simply too 'flat' to belong to this class. There are only two major differences between the two leftover classes, 9a2 and 9b1; The shape of the letter S on the obverse (in this case not visible) and the possibility of a pothook-N. The latter proves to be incredibly useful, for this coin actually has a pothook shaped N! it therefor belongs to class 9b1, still an Edward I, issued between 1299-1301. A minor difference compared to the previous ID, I know, but it's always nice to know the specifics! Nice coin, by the way!

Mika