its a very nice coin, congratulations. i was also curious and poked around the net about the motto, i found this:
Small Motto vs. Large Motto
Determining the difference between 1864 Two Cent Small Motto and Large Motto varieties is fairly easy. On the obverse of the Small Motto (top image above), the D in GOD is wide, and there is a stem touching the ribbon. The D in the Large Motto (lower image) is taller and narrower, and there is no stem touching the ribbon. The Small Motto variety is much scarcer than the Large Motto variety, and is considered a key date.