Ben Hogan claimed his golf swing was better before his injuries from the near fatal collision with a Greyhound bus in 1949. After he recovered from those injuries his swing changed in a subtle manner but he knew the difference.
In a terrific article by Jaime Diaz and corollary article by Jim McLean in the June 2009 issue of Golf Digest, The US Open Preview Section this piece of golf history is discussed in detail. The conclusion from the analysis supports Hogan's perspective.
The Ben Hogan Collection provided the film clips from which the still shots were produced by Golf Digest. The layout is lacking as the photos are much too small to help support the points McLean makes in his article. The photos should have been larger.
So, for Hogan fans and those players working on their golf swings, the swing model to use would be from Hogan's post WWII years prior to the accident. You can see this swing in The Ben Hogan Collection dvd set and software.