Watch List notes:

BITHYNIA, Nicaea. Julia Mamaea. Augusta, AD 222-235. Æ (21mm, 5.14 g, 2h). Draped bust right / Three signa (only the signum on the far right is visible, the other two being covered by the additional obverse strike). Cf. BMC 106. Near VF, green patina, flip-over double strike. An interesting mint error.