Watch List notes:

Severus Alexander. AD 222-235. AR Denarius (18.5mm, 2.94 g, 12h). Rome mint. 10th emission, AD 229. Laureate bust right, slight drapery / Mars advancing left, holding branch, spear, and shield. RIC IV 92 var. (bust type); BMCRE 606 note; RSC 365a. Toned. Near EF.

The example in the Brititsh Museum was an anonymous gift in 1924 and came from the Plevna Hoard.