More variety madness - Mexico 1818 8 Reales

Second 1 in the date looks to be struck over something. Could be a die chip, but the geometry is too straight in my opinion. Upside-down 1? Letter I from the legend? Something else? In any case, I've looked at hundreds of 1818's and this one is the first for me, so in the collection it goes! MADNESS!
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Comments
I still think is an I, but who knows. Well done!
excellent images... The I looks to be a reasonable explanation- That would be my guess
Experience the World through Numismatics...it's more than you can imagine.
MADNESS indeed !
I give away money. I collect money.
I don’t love money . I do love the Lord God.
You are the Harry Bass of Mexican Portrait 8 reales varieties
Latin American Collection
The scale is a tad different, but thanks for that.
Images courtesy of Heritage photo lab
8 Reales Madness Collection