From the AP:
Show creator Matthew Weiner and production company Lionsgate have donated the “Mad Men” archive — scripts, drafts, notes, props, costumes, digital video and reams of research materials that went into creating the show’s richly-detailed presentation of the American 1960s — to the University of Texas’ Harry Ransom Center humanities library.
Weiner, who also wrote and directed many episodes, said he donated the archive to the Ransom Center because he couldn’t stand the thought of the material being dispersed at auction or lost forever.
The “Mad Men” collection from its 2007-2015 run starring Jon Hamm and Elisabeth Moss includes a selection of costumes and props. They include Draper’s terms of re-employment letter (meticulously typed in a size of font typical of the time), Betty Draper’s medical file, advertising poster boards, rolodexes full of phone numbers, and even a fictitious “Star Trek” episode that one of the show’s characters had hoped to get produced.
Promo Video from Ransom Center