Numismatist Needed
Numismatist is a man who works with coins. These people can have countless and massive expertise with old kinds of coins. Some are old, some are rare and some are just interesting. There is no need to add that Kate believes she is holding a coin in her hand.
She found a numismatist and she started asking all kinds of questions. The man told her that there is no way to tell her all of that at once. He will need to look in detail to see what kind of thing it is. But he knew one thing immediately. This is not a coin. So what is that thing?