Leo I, AR Siliqua, 17mm, 1.25 gr. 457-474 AD, Constantinople. 

D N LEO PERPET AVG, pearl diademed, draped, cuirassed bust right.
SAL REI PVI (partially ligate) in three lines within wreath.
Mintmark CONS star.

RIC 648. 

Contributed by Dr. Hubert Lanz, auction November 2000, 
Added July 2011.