Watch List notes:

Herennius Etruscus. As Caesar, A.D. 250-251. AR antoninianus (22 mm, 3.48 g, 5 h). Rome, under Trajan Decius, A.D. 250. Q HER ETR MES DECIVS NOB C, radiate, draped, and cuirassed bust of Herennius Etruscus right, seen from behind / PIETAS AVGG, Mercury standing facing, head left, holding purse and caduceus. RIC 142b; RSC 11. Lightly toned, two scratches in reverse field. Very fine. 

From the Maple Leaf Collection.