About Celtic Potin Coins, cast high-tin bronze coins of Iron Age Britain featuring abstract horned beasts and solar wheels minted before the Roman invasion.
Long before Julius Caesar set foot on the white cliffs of Dover in 55 BCE, the Celtic tribes of South-Eastern Britain (such as the Cantii and Trinovantes) possessed their own unique coinage: Potin Coins (often called "Thurrock Types" or "Kentish Pegged Potins").
Minted around 150 BCE to 50 BCE, Celtic potins were fundamentally different from Greek or Roman coins: they were not struck with steel dies on cold metal planchets; they were cast liquid in clay strip molds.
The Potin Alloy: High-Tin Bronze
Potin was a specific alloy of copper heavily mixed with tin (often up to 25% tin), lead, and traces of zinc. When cast, the high tin content gave the coins a brilliant silvery-grey sheen, making cheap base metal resemble precious silver.
Abstract Mythology and Horned Beasts
The imagery on Celtic potin coins was inspired by Greek coins from Massalia (Marseille), but distorted through the lens of Celtic druidic mysticism:
- Obverse: A highly stylized, abstract head of Apollo reduced to geometric crescents, lines, and solar eyes.
- Reverse: A charging horned bull or mythical beast, rendered as a series of fluid, curvilinear strokes representing wild natural energy.
Clay Strip Casting Technique
Celtic metalworkers carved wooden runners and pressed them into moist clay frames to create chains of connected circular coin molds. Molten potin metal was poured down the channel, filling up to 30 coin cavities in a single pour. Once cooled, the coins were snapped off the runner, leaving characteristic raised "sprues" on opposite edges of every coin.
Celtic potin coins represent the earliest native coinage produced on British soil—a testament to Iron Age metallurgy and tribal commerce prior to Roman conquest.
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