Looking good. What seperates a Newnan from a Marion and really a Hillsborough is the base. A Newnan has a flat base with the sides meeting the point at a slight angle.
A Marion has a rounded base with the tips the same as a Newnan or 90 dgs from the base to the point.
The Hillsborough is the same as both, except it has a real short base that is trianguler shaped, and usually broke when you find one.