That is what is called a Die Chip. It's a Die Break on the Die itself. That area of the digit flowed into the break causing the Die Chip. Common. Clad refers to something else. For example.. After 1964, Quarters were no longer silver but have Clad layers. Nickel clad with a cooper core. So any coin with a copper core is a clad coin. Quarters, Dimes and Halves.