Justinian I AE 8 Nummi.  527-565 AD.  Mint of Thessalonica.

obv: D N IVSTINIANVS P F AVG, diademed, draped & cuirassed bust right 
rev: large H between smaller A and P, chi-rho above.

Sear Byz. 191.

Courtesy of Dirty Old Coins. Nov. 2010.