I think your coin is an N-10, with a rarity of 2+
I can't see for sure, but there appear to be horizontal, raised lines extending right of the N in ONE. If that is true, then I'm confident of N-10. Also, I can't see it from the photo, but there should be a small elongate lump to the right of Y in LIBERTY.
(source: The Die Varieties of US Large Cents 1840-1857 by J. Grellman)
I have never had much luck online with large cents. Here are two sites that are of some, limited use for die variety searches:
http://www.largecents.net/collection/photoindex.htmlhttp://www.eacs.org/