ORC2017 Nero & Stat. Mess, as, Galba ctmk.

Nero, Æ27, (10.54g) Nicaea, Bythinia, NEPWN K[LAY]DIOS KAISAP SEBASTOS GE
Laureate head left, rectangular countermark GALB[A]. / ME[SSALEIN]A [GYNE
SEBASTOY] Statilia Messalina as Securitas seated right. cf. RPC2061(3 known
right facing, same reverse die as RPC plate coin), countermark Howgego591.
Coin and countermark VG, porous dark tone, flan split.