Supper Mario Broth has made an interesting discovery about the coins that appear in the Super Mario games.

The blog claims that the coins that appear in the Super Mario games have a sans-serif capital letter “I”. The reason is because in Super Mario Advance, the coins have a regular serifed “I”, which you can see at the very far right of the picture below:

It is unclear what the “I” in these coins mean, so we’ll probably have to hope Nintendo sheds some light on that in the future.

What do you think? Let us know in the comments.

UPDATE: Supper Mario Broth has deleted their previous tweet and said they overlooked the simple explanation that the rectangle stands for the roman numeral 1 (thanks Nintenderos):

In a previous tweet, I have claimed that it is unknown what the letter "I" on the standard Mario coin design would stand for. I overlooked the extremely simple explanation that it is the roman numeral 1, standing for "1 coin". I apologize deeply for misjudging the situation.

— Supper Mario Broth (@MarioBrothBlog) April 7, 2019