Watch List notes:

Trajan Decius. AD 249-251. Æ Semis (18.5mm, 3.89 g, 12h). Rome mint, 5th officina. 3rd emission, AD 250. Laureate and cuirassed bust right / Mars standing left, holding shield set on ground to left and reversed spear. RIC IV 128. Brown patina, minor roughness. VF. The smallest denomination of coinage for Trajan Decius is the Semis and is represented by this single type.