Looks a lot like Clint Walker who played Cheyenne in -- get this -- the 50s, one of a series of TV westerns that ran concurrently with Maverick (James Garner, who played Mel Gibson's dad in the movie a few years back. Somehow I don't think it is Clint, a giant of a man who suffered a near life ending skiing accident in the 70s(?) but I believe is still kicking. But it does look like him. Most esecially the eyes and expression, not to mention the dark hair.