Mauser broomhandles turn up in other Cowboy movies as well, as if "Joe Kidd" wasn't enough...
"The Great Silence" (1968)
"Tepepa - Long Live the Revolution" (1968)
http://website.lineone.net/~braithwa...uns/mauser.htm
But here is the real motherload of C96 film appearances, including "And Starring Pancho Villa as Himself", which I have not seen:
http://www.g6csy.net/c96/films.html
All of this supports the "Wild Bunch" class in Cowboy Action Shooting, in which auto pistols made in the vicinity of the 1914 Mexican Revolution are permitted. This date seems to be the outer edge of things considered "Cowboy".
H