Phoenician coins, decoded

Byblos, circa 350 BCE. A bronze coin, smaller than a thumbnail, struck with the image of a galley beneath a winged sun. On the reverse: an owl perched on a crook, surrounded by Phoenician script too small to read without a loupe. This is not a rarity. Tens of thousands of pieces from this mint survive. But most buyers don't know how to read one.

The iconography is the first entry point. Phoenician city-states each had preferred symbols: Byblos used the galley, the eagle, and the falcon; Tyre favoured the owl, the murex shell, and the hippocamp; Sidon featured the galley prominently alongside Persian satraps in profile during the period of Achaemenid influence. Once you learn the vocabulary, the city of origin becomes readable within seconds.

Flan quality — the shape and thickness of the blank metal disc — narrows the dating further. Earlier Phoenician bronzes tend toward irregular, hand-cut flans with uneven edges. The move toward standardised, round, machine-struck flans accelerates after Alexander's conquest in 332 BCE, when Hellenistic minting techniques spread rapidly through the region.

Patina is the final layer of information, and the most easily faked. Genuine antique bronze develops a stable patina over centuries: green cuprite, blue-green malachite, sometimes a layer of azurite. The surface should be hard, not powdery; the patina should sit in the recesses of the design, not on top of it. A fresh patina applied chemically tends to be uniform in colour and superficially distributed — it sits on the high points rather than the low ones.

We recommend every buyer of ancient coinage spend an afternoon with a reference collection before purchasing. The American Numismatic Society's online corpus is freely available. Familiarity with genuine patina, genuine flan texture, and genuine iconographic vocabulary takes approximately three hours to build, and it will save you considerably more.