Beautifully crafted sterling silver necklace with an authentic ancient coin by California jeweler Erez Epshtein. 16" sterling silver chain with 2" extender.

Beautifully crafted sterling silver necklace with authentic ancient coin by California jeweler Erez Epshtein. 16" chain with 2" extender.

Denomination: 20 Nummia, Bronze

This coin was minted in bronze throughout the Byzantine Empire in wide variety. The "K" stands for the coin's value, which is 20 nummia (equal to half a follis). The word "ANNO" that is written to the left of the "K" means "year" and the Roman numerals to the right of the "K" was the reigning year of the emperor who is depicted on the reverse side of the coin.
Nummus (Greek: voviov, noummion) is a Latin term meaning "coin", but used technically for a range of copper coins issued by the Roman and Byzantine empires during the monetary reform of Anastasius in 498, who reformed the late Roman Empire coinage system which consisted of the gold solidus and the bronze nummi. The nummus was an extremely small bronze coin, at about 8–10 mm, weight of 0.56 g making it at 576 to the Roman pound[3] which was inconvenient because a large number of them were required even for small transactions. 

New bronze coins, multiples of the nummus were introduced, such as the 40 nummi (also known as the follis), 20 nummi (also known as the semifollis), 10 nummi (also known as the decanummium, and 5 nummi coins (also known as the pentanummium); other denominations were occasionally produced. The obverse (front) of these coins featured a highly stylized portrait of the emperor while the reverse (back) featured the value of the denomination represented according to the Greek numbering system (M=40, Λ=30, K=20, I=10, E=5). Silver coins were rarely produced.