I was just watching the episode of Mythbusters where they addressed Apollo moon landing myths. In one setup, Adam showed a scale model of an Apollo moon suit and claimed you could tell it was Neil Armstrong because of the red commander stripes on the helmet, sleeves, and legs. The purpose of the stripes was to make it easier to identify the astronauts in mission photos.
Neither Armstrong on Apollo 11, nor Pete Conrad on Apollo 12 had commander stripes on their suits. No one had realized they were necessary until the images from Apollo 11 were reviewed.Jim Lovell of Apollo 13 would have been the first to wear them on the moon if they had made a successful landing. Alan Shepard of Apollo 14 was the first to wear them on the moon.
Note that I confirmed my recollection before posting this, but my memory was correct.