AJ on Instagram: "Those tiny ridges on the edge of a coin? They were Newton’s way of fighting crime. 🪙🧠 In the 1600s, coins were made of real gold and silver. People would clip the edges — shaving off tiny bits of metal — and still spend them at full value. Enter Isaac Newton. As Warden of the Royal Mint, he introduced reeding: sharp ridges carved into the coin’s edge. If someone clipped it, the damage was obvious. It was simple, brilliant, and nearly impossible to fake. So next time you feel

Exploring South African Coin Patterns and Collectibles