3. As many of us seen, sometimes they weld an extension on the 4" barrel to make it Restricted, in that case very often the site sits behind the welded piece and the barrel looks like Pinocio to me.
One more thing, it could be a 27-2 and not a Patrolman. Some people including gun store employees may not know the difference. The 27 came in many barrel lengths and visualy is much nicer. One sure way to tell is look at the inside crane(for model number) and the top strap, if smooth (not checkered) then its a 28. If only barrel portion is checkered than someone swaped barrel from 27 onto 28.