Watch List notes:

ANCIENT COINS, PARTHIAN COINS, Vonones I (c.AD 8-12), Silver Tetradrachm, overstruck on a Tetradrachm of Phraataces and Musa (S 58.1-7) at Seleucia on the Tigris, diademed bust left with long and square cut beard, short hair, ear and ear-ring visible, spiral torque, around BACIΛΕYC BACIΛEШΝ ΟΝШΝΗC, rev Nike walking left, year ΓKT (323 SEM) in front, seven line inscription ΒΑΣΙΛΕΩΣ ΒΑΣΙΛΕΩΝ ΑΡΣΑΚΟY ΕYΕΡΓΕΤΟY ΔΙΚΑΙΟY ΕΠΙΦΑΝΟYΣ ΦΙΛΕΛΛΗΝΟΣ, month ΔΙΟY (Dios, Nov/Dec AD 11) in exergue, 13.05g, 12h (S 60.4 var). Good fine, very rare.
from The David Sellwood Collection of Parthian Coins

Estimate: £200-250