Originally Posted by rando_couche

Nope, nope, nope. Not a paint ridge, not a crack, not a casting flaw. It's a weld seam. Those crowns were not cast (too expensive); they were stamped and welded from flat metal. That weld runs all the way across the bottom of the crown. I worked at a Trek dealer back in the mid 80's and got quite familiar with those crowns.