Printed typed form letter signed in ballpoint, "Mickey Mantle," one page, 8.5 x 11, personal letterhead, no date. Letter to "Ken," in part: "I'd like to take this opportunity to thank you for becoming a member of the 'Mickey Mantle Collectors Club.' As a major league rookie, you hope that one day your accomplishments on the field will merit the recognition of baseball fans. To be remembered so many years later by collectors, the most ardent fans of all, is something I never dreamed would be possible." Mantle adds the recipient's name in his own hand. In fine condition. Encapsulated in a PSA/DNA authentication holder.