Been a while, but I just saw this. If you mean the fight the Indian helped to start, I didn't see one scene where Duke had a stunt man. After all, he and Yak perfected the fights. Usually, the only time he is stunted is when he has to fall badly, go through a window, or something of the sort. He really enjoyed doing the fight scenes from what I have read and "fought" the directors to be able to do some they didn't want him to.
Of course, I was watching this on You Tube. I did see one very far shot when Duke was just standing there that I was not sure it was him. Can't imagine why he would have a double for that though. Keith Guess you noticed Frank McGrath and Terry Wilson of Wagon Train were both in it.....Frankie was the small bartender and Terry was at the head of the steps....later he was knocked silly through the saloon doors.
There's a couple of long distance shots that do not look like the Duke.
