Can't see much, but that curl looks over the center of the 1 in 16. Looks more like an N-7, but just my swag.
First, let's identify the obverse. There are 7 Obverses for 1816. The stars and dentils on the left side are visible and the location of the (18) 1 (6) is visible. We will use these to rule out as many as possible. The star closest to the date on the left (star 1) is just right of the gap points directly to the middle of a dentil. Obv 1 Check. Obv 2 Just right of the gap - no. Obv 3 Just right of the gap - no. Obv 4 Check. Obv 5 Just left of the gap - no. Obv 6 Check. Obv 7 Almost at gap - no. So we've narrowed it down to Obv 1, 4 or 6. Next star clockwise from star 1 is star 2. It points just right of the center of a dentil. Obv 1 Check Obv 4 Check Obv 6 Check No help here. Next star clockwise is star 3. It points just barely right of gap between dentils. Obv 1 Check Obv 4 Point is well left of gap - no. Obv 6 Point is further right of gap - no. But we'll double check to be sure. The second 1 is just left of center of dentil. Obv 1 Check. Obv 4 1 is over a gap - no confirmed. Obv 6 1 is just left of gap - no confirmed. We have the attribution for the Obverse - Obverse 1. This Obverse is paired with reverses A, B and C. (UN) I is dotted with a dentil over it. Rev A Check. Rev B Gap over I - No. Rev C Gap over I - No. So it looks like N-1 to me.
The I in UNITED is dotted by the dentil. The position of the leaf tip under D in UNITED is just above center and positions of other leaf tips to the letters in UNITED, in addition to the spacing and position of the date and stars all match up to an N-1 vs the other 1918s.
The third sentence should read: The star closest to the date on the left (star 1) points directly to the middle of a dentil. Sometimes the features designed to help...don't.
Thanks for the help. I was a little uncomfortable using the leaf tip under the D because there appeared to be some damage there. But it is an excellent diagnostic point for reverse identification.
