Yours is from the same dies as BM 39, pl. 1, and a little better preserved too, confirming the
rarity of the
type. BM 83 that you mention, pl. 3, with the same
type but descriptive
legend, is also from the same
obverse die.
You are aware that all bronzes of
Alexander in 222 are
rare? That's why they come up relatively infrequently, and new specimens often share dies with those previously known.
Apparently the
reduced volume of bronze production introduced by Septimius and
Caracalla and continued by
Macrinus and
Elagabalus also lasted until the end of Alexander's first year. It was only with the new bronze
types of
his TR P II that a higher level of production was resumed.