I thought it would be interesting to examine the swings/mechanics of some old-timers, and they don't get any better than the Babe.

Attached below is a link to some video of the Babe, showing many different swings over his long career.  The best perspective on the swing, I think, comes around 2:09 in this clip.  I believe that is his 60th HR swing from the 1927 season.

http://www.youtube.com/watch?v=aB1Z-7yDSAY&feature=related