DN... , Anastasius facing right / Monogram of Anastasius within wreath, no mintmark. 10mm, 0.60 grams. Constantinople mint, minted 491-498 AD. DOC I 15; MIB I 40; SB 13.
In 498 AD Anastasius instituted a monetary reform, changing the system completely and breaking with the traditions of Roman coinage. This is the last Roman AE4 issue ever struck.