Passenger side mirrors were very rare options in the 50's because the roads were 2 lane and you didn't worry about someone being on your right side. We installed the goofy looking mirrors because we pulled trailers quite often and the only way to back is with 2 mirrors. In fact, the 50 GMC my father gave me when I was 14 had a mirror inside the cab. My father removed it so I would learn to use the outside mirrors.
