No need for third-party authentication with this signature! Passports have long been high on collector's lists of desirable keepsakes from famous people. This unique example dates to a 1970 origin, with a termination date of 1975. Kiner did not do a lot of traveling on this visa, but it does show several South American stamps along with a few European locales, with one of the first uses for this passport indicating a trip to Casablanca. Includes the original black and white portrait and ball point signature, Near Mint to Mint condition overall. Full LOA from University Archives (John Reznikoff), cert. #11078.