Translation of legend abbreviations:
AVT(OKPATΩP) KAIC(AP) TPA(IANOC) AΔPIANOC CEB(ACTOC)
Imperator Caesar Trajanus Hadrianus Augustus
EGYPT, Alexandria. Hadrian
year 22, CE 137/8
tetradrachm, 23 mm, 12.3 gm
Obv: AVTKAICTPAAΔPIANOCCEB; laureate head right
Rev: ΠPONOIA; Pronoia standing left, holding phoenix and sceptre; KB left
Ref: Emmett 881(22), R1
from a mostly US dealer at August 2014 ANA World's Fair of Money
At some point in its life this coin was covered with gold leaf. I don't know why. Much of it remains in the fields.
Not commonly seen on ancient coins, this personification first appears on Roman provincial coinage late in Hadrian's reign. She represent foreknowledge and anticipation of important events.