I was attributing this 1844 Large Cent last night, and noticed it was an N-3, but when I checked Newcombs book, he has a State a. and a State b..The state a. has an outline at the lower left of the 1 and 8. It's clearly visible here. So I'm calling my 1844 an N-3a, although it's not an official variety. BTW, this is my first pic with my new $15 usb microscope.
