5 Nummi - Anastasius I Dicorus Constantinopolis, no Officina Letter

Anastasius I's currency reform of 498 AD overhauled a bronze coinage system that had deteriorated so badly that small denomination pieces were effectively trading by weight rather than face value. The reform introduced clearly marked denominational values — the numeral on the reverse indicating the coin's worth in nummi — replacing decades of ambiguity in small bronze transactions.

The absence of an officina letter on this Constantinopolis issue remains a cataloguing puzzle. Most scholars treat it as an early transitional product of the reform, before workshop attribution was systematized across the mint's output.