Justin II. 2 1/2 Nummi. Rome. AD 565-578. 10mm, 1.17 g. 

DN IVST.., helmeted and cuirassed bust facing, holding cross on globe and shield.
Large CN in wreath. 

Sear 283c corr. ("Justinian I"); MIB 212

With permission of cngcoins.com, auction 415, Lot 561, Feb 2018