Flown checklist carried on board the Apollo-Soyuz mission in 1975 and used by Deke Slayton. Double-sided checklist measures 5.75 x 8, with one side labeled at the top, “UVA 150 M O/P,” and the other side listing the procedure for “UVA Prep,” and lists procedures for undocking from Soyuz. Each side has four small affixed swatches of Velcro for mounting to the control panel. Accompanied by a 2006 letter of authenticity from Slayton’s wife Bobbie, which reads, in part: “This checklist was flown on the Apollo Soyuz Mission and was used by Command Module Pilot Donald K. ‘Deke’ Slayton.” In fine condition. Provenance: Regency-Superior: April, 2007. RR Auction COA.