Watch List notes:

Severus Alexander (222-235), As, Rome, AD 229; AE (g 10,77; mm 25; h 12); IMP SEV ALE XANDER AVG, Laureate bust r., Rv. P M TR P VIII COS III P P, Severus Alexander driving triumphal quadriga r., holding eagle-tipped sceptre and reins. RIC 498b.
Expressive portrait, nice green patina, extremely fine.

Ex Gorny & Mosch, Auction 204 (5 March 2012), lot 2425.