I lived in IN for about 7 yrs. I moved to different locals each & every year. I've lived in Speedway, Indianapolis (off of 83rd street), Avon, Fishers, Kokomo & Evensville. I know where Vincennes is on a map.
I miss the state.
Anyway, your piece is very cool. It looks like Roseville at a cursory glance. McCoy & others copied forms/colors/glaze too though. Without significant investigation...it is definitely from Ohio.
You aren't considering selling it are you? Unless your mother & grandma beat you as a kid, I urge you to hold on to it.
It's a tangible thing that holds their energy & remembrance.
Only my 2 cents,
Tyler