It was. Moore used it in the movie Live and Let Die. http://www.imfdb.org/wiki/Live_and_Let_Die#Smith_.26_Wesson_Model_29. In addition to the movie being Moore's first Bond movie, it featured one of Paul McCartney's greatest post-Beatles songs.I believe it was a S&W mdl 29 used by Roger Moore.
A Korth of course.
In the original books he had a Ruger Super Redhawk in .44 mag under the dash of his Bently.