Constantine IV. 668-685 AD. AE Decanummium, Constantinople.  3.18g.

No legend, helmeted, cuirassed, unbearded bust facing, holding cross on globe 
Large I, cross to left, cross above, K to right; mintmark CON. 

SB 1182, DOC 38. RARE


$55 as buy it now price, from seller old_gallery, Nov. 2010.