Rare commemorative cover with a stamped blue cachet honoring the tragic AS-204 "First Three Man Apollo Mission," bearing postmarks from the day of the disastrous fire, including a "Kennedy Space Center, Jan 27, 1967" machine cancellation plus rare additional hand-stamped postmark. In fine condition, with toning from envelope adhesive. The cachet was applied by NASA, not a private party, and only an estimated 40 such covers are believed to exist.