OK, it's definitely not Aethelred since if it was, the
obverse inscription would start with the dipthong AE (I don't know how to
type it). It's a pity, if only because 'Aethelred Unraed' sounds marvellous until you translate it (Ethelred the Unadvised, or Unready). The last word in the
inscription, ANGLOX, takes up almost half of the
circle. This is the case in the only Eadgar
type with
bust left illustrated in the 1963 edition of
North, the Reform
Portrait type, which has ANGLOX. On the Edward the Martyr
types illustrated, whatever abbreviation of ANGLORUM is used takes considerably less than this. So I'd plump for Eadgar.