Yes, I've noticed as much so far! I'll have to do some digging on this site for some physical features used for dating. One thing I noticed in that add and another online, was that they both have Williams front sights with gold inlaid lettering. The 338 I looked at does not have that gold inlay and it may not have said Williams on it. The other one on a site (not the one on the site I posted) also has a checkering style that is a little different than the 338. The 338 has a "border" around the edges and the other seemed to have its lines terminating early depending on whether it was too or bottom... Hard to describe.