Flown fragments of ablative aft heat shield from the the Apollo-Soyuz Test Project, used to dissipate heat during the Command Module's fiery reentry. Encased in a limited edition cylindrical 2.75˝ x 3.25˝ piece of Lucite cut at an angle for display purposes, numbered 162/200, with a mission insignia and a certificate of authenticity at the bottom. In fine condition. Originally distributed through the Astronaut Scholarship Foundation and accompanied by a laminated certificate of authenticity signed in blue ballpoint by ASTP CMP Vance Brand.