Not A Coin
The experts informed Kate that although it did look like a coin, it was actually a piedfort, which looks a lot like a coin. The difference is that piedforts weigh around twice as much as coins and they are double as thick.

Not A Coin
An Understandable Mistake
It was understandable that Kate mistook the piedfort as a coin, anyone not in the business would make such a mistake. She now became curious about piedforts and what one was doing buried in her childhood backyard.

An Understandable Mistake