Complete flown Command Service Module Updates checklist carried aboard Apollo 10, used during the flight and heavily notated in pencil. Checklist consists of 52 cardstock 5.5 x 8.25 pages (including covers) bound by three metal rings, titled on the front, “Apollo 10, CSM Updates, Part No. SKB32100079-330, S/N 1001,” and signed and flight-certified in black felt tip, “Flown on Apollo 10, John W. Young.” Fourteen of the pages are filled out in pencil with various times, measurements, and technical data under headers that include “Set Stars,” “Ullage,” “Horizon/Window,” “Purpose,” “PTrim,” “YTrim,” and “Hrs, Min, Sec.” All but two of the annotated pages are in the section labeled “P30 Maneuver,” with another in the “P37 Block Data” section and the last in the “Lunar Entry” section. Some rust to binding rings and a stain to the right edge of many pages, otherwise fine condition. Young was the Command Module Pilot on Apollo 10 and flew the spacecraft into lunar orbit, presumably jotting down the measurements in this “Lunar Entry” section in the process, and he remained in the CM alone while his crew members Tom Stafford and Gene Cernan completed a ‘test run’ for landing the Lunar Module. As flown Apollo checklists are increasingly scarce and Young is one of the more difficult autographs to obtain, this presents an absolutely outstanding combination. Pre-certified Zarelli Space Authentication.
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