Translation of legend abbreviations:

AVT(OKPATΩP)  KAIC(AP)  TPA(IANOC)  AΔPIANOC  CEB(ACTOC)

Imperator Caesar Trajanus Hadrianus Augustus

K B

year 22

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.

 

Pronoia

 

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.