Watch List notes:

Constantinus I (306-337) - BI Centenionalis (Siscia AD 328-29, 3.71 g) – CONSTANTINVS AVG, laureate bust right / PROVIDENTIAE AVGG, two-turreted gateway of military camp, star above, mint mark SIS in exergue preceded by officina mark B, double crescent following the mint mark (RIC vii, p. 452, 214) – EF