Watch List notes:

Pupienus Mule, rev. of Balbinus; 238 AD, Rome, Denarius, 3.65g. BM-50, C-29 (10 Fr.), RIC-5. Obv: IMP C M CLOD PVPIENVS AVG Bust laureate, draped, cuirassed r. Rx: P M TR P - COS II P P Genius of the Senate standing l. holding branch and short scepter. A rare mint mule, this reverse type being meant for Balbinus not Pupienus on denarii. Not in the BM collection by 1962: BMC-50* cites and illustrates the Paris specimen instead. The Eauze hoard contained seven Genius of the Senate denarii of Balbinus, but none of Pupienus, among the 18 denarii of that emperor in the hoard.Extremely Rare Extremely Rare. Mint State (2450)