Watch List notes:

ANCIENT COINS, THE DAVID SELLWOOD COLLECTION OF PARTHIAN COINS (PART FOUR), Artabanus IV (c. AD 10-39/40), Silver Tetradrachm, minted at Seleucia on the Tigris, diademed and long bearded bust left, hair covering ear and ear-ring, spiral torque, rev King enthroned right, Tyche standing left, holding palm branch and cornucopia in right and left hands respectively, month ΓOP (Gorpiaios) above arm, seven line inscription ΒΑCΙΛΕΛC ΒΑCΙΛΕΛΝ ΑΡCΑΚΟY ΕYΕΡΓΕΤΟY ΔΙΚΑΙΟY ΕΠΙΦΑΝΟYC ΦΙΛΕΛΛΗΝΟC, year (ΓKT = 323 SEM?) off the flan, 12.92g, 12h (S 61.2 var (Artabanus II)). Good fine, rare.
This coin has flipped during striking, leaving traces of the first two lines of inscription as well as the palm branch and abbreviated month name ΓOP respectively on king's shoulder and neck. Part of the obverse design is also discernible on the reverse between 6-7 o'clock.

Estimate: £200-250