PB Tessera, Time of Justinian I 527-565 AD, 5.45 gr, Illyria (?). 

Monogram Gamma, P and c. 
Large I between small I and star over Phi over dot. 

Good Very Fine.

Ex Künker sale 20, 1991, lot 1032.
Courtesy of Stack's, The Golden Horn Collection, lot 3090, Jan. 2009