Groucho Marx, who was making movies around 1920, is a great example of good posture. He had a characteristic walk called the "Groucho Glide", a precursor to the Gokhale Method glidewalking! This a link to a short clip where you can see his J spine, hip-hinging, and shoulders back. Watch as he turns his head to the side. There is a short segment at the beginning where he does the Grouch Glide.