Leo V and Constantine, AE Follis, Syracuse. 813-820 AD. 

LEO (or no legend), Leo on left and Constantine on right, busts facing, 
both crowned, wearing chlamys, cross over dot between them.

large L dot K, cross above. 

SB 1635, DOC 19. 
with permission of bargainbinancients.com, Feb. 2011.