Watch List notes:

BYZACIUM, Thaena. Augustus or Tiberius. 27 BC-AD 14 or AD 14-37. Æ Sestertius? (37mm, 37.31 g, 1h). Struck AD 13-17(?). Bare male head (Augustus or Tiberius) right / Draped bust of Sarapis right. Cf. RPC I 810 for smaller denomination; cf. MAA 55 for smaller denomination. Fair, dark green to black patina, some pits and metal flaws. Extremely rare.

This denomination appears to be unpublished in the standard references, and is perhaps the larger denomination of the same type as RPC I 810.