There is something about the early examples I can't quite put my finger on. Both of my BDA's and my P75's, all built in the 70's just seem to be more finely built than the later ones. Even my P6, built in 1982 isn't as smooth when you work the action and the trigger is heavier. I also have a P228 made in 1991. It's very nice but again, the action isn't as smooth and the trigger pull is a little heavier than my 70's P220's. The early ones are almost as smooth as a 210.