Sorry for the poor photo. I had a hard enough time seeing this in the loupe much less with my sub-par camera. There's little diagonal lines shooting off from the N, I and T headed for about the 1:00 position.
Frank is in rare form tonight. Me I would call it very interesting. Not sure what they are, almost looks the same as http://lincolncentresource.com/TrailsandWavySteps.html, but with a reverse direction.