Alexius IV, 1417-1446 AD. AR Asper (0.81 gm). 

L in circle, EG-N, St. Eugenios on horseback riding right.
ALE-M, Alexios on horseback riding right. 

SB 2641. 
Toned VF, flat spot. Scarce. 

With permission of Pegasi Numismatics Auction 140, lot 499. August 2011.