I recently viewed a YouTube video on detecting fake American Silver Eagles and one of the things he said to look for was the detail on the star field of the flag on the obverse. On the coin that was identified as fake, the field surrounding the stars was undulating but smooth, whereas the field on the real ASE was undulating but marked with fine line crosshatching. I thought that was interesting so I pulled out a tube of ASE culls that I had purchased recently and examined them. There were two coins from the 80's (an 1988 & 1989) that displayed smooth, non-crosshatched fields. I then noticed that the coins from the 1990's had crosshatching but it was much less well-defined than the crosshatching on the coins from the 2000's. I also pulled out my copy of American Silver Eagles by John Mercanti and looked closely at the pictures of the years in question and noticed the same thing. A gradual strengthening of the lines over time. Is this a documented design variety? Has else anyone noticed this?