Verifying social security cards and how they look?

I need to find a site that shows what social security cards have looked like for the past 60 years. I know the government has changed the way they look. But I am try to verify social for employment and have a few that just does not look right. Can someone give me a phone number or a site that I can contact?
Verifying social security cards and how they look?
If you are an employer trying to verify a social security number go to http://www.ssa.gov/employer/ssnv.htm