As Severus Alexander - emperor in quadriga

SEVERUS ALEXANDER. Æ As. Rome, 229 AD. Obv. IMP SEV ALEXANDER AVG laureated head right Rev. P M TR P VIII COS III PP SC emperor in quadriga r., holding scepter surmounted by an eagle. RIC 498a; Cohen 379 (12 F) These ex are usually well-struck on full flans with a detailed reverse and a very meaningful subject: they seem to belong to a special issue. Possible New Year's gift issue, as demonstrated by Curtis Clay?