Leo I (Augustus in the East 457-474 A.D.) -  AE4 - 11.35mm, 0.82gr
Obverse - DN L-EO
Leo, his pearl diademed, draped and cuirassed bust right.
Reverse - No legend,
CON in Exergue.
Lion crouching left, head right, within wreath (broken by mint-mark)
The image below was photographed by Rasiel Suarez from dirtyoldcoins.com. The image above is my own scan.

Minted in Constantinopolis between February 7, 457 and January 18, 474 A.D.
Kent, J.P.C., "Roman Imperial Coinage", Volume 10 (RIC), p293, nr 676, obverse L20/D3
Sear, David R., "Roman Coins and their Values" (RCV 4th Revised Edition), p369, nr. 4341, variety
Carson, R.A.G., Hill, P.V., & Kent, J.P.C., "Late Roman Bronze Coinage",  Part II, p91, .nr 2260, variety
Van Meter, D., "Handbook of Roman Imperial Coins", p329, nr 16, variety
Quality: ???