The Mail Dish
A mailbox is meant for letters and postage, so it is normal to be surprised when you see a strange dish that cannot be explained. Looking at it closely, this strange thing looked like a tiny seat for ants or even a bird perch. Another explanation is that it could have been a tool for placing the envelopes neatly, but that doesn’t really make sense.
Eventually, the purpose of this dish was figured out, thanks to the helpful people of the internet. It serves as a means of keeping change for postal workers. In the case that a letter or postage arrived with insufficient funds, the mail recipient will utilize this dish to leave change for the postal officer.