Constantine IV Pogonatus AE Pentanummium, AD 668-673. 18mm, 2.90 g. Constantinople. 

No legend, helmeted, cuirassed bust facing, no beard, 
holding spear over shoulder.
Large Epsilon, no fieldmarks or mintmark.

SB 1184; MIB 95; DOC 40

With permission of cngcoins.com, Feb 2013