Master Countdown, [Gemini] Launch Vehicle, Launch GLV-9. Martin Co., 2 May 1966. 8/so. Spiral-bound wrappers. The manual was actually used in the blockhouse at Pad 19 during the Gemini 9 launch and has over 20 pages of manuscript notes and milestone completed check-offs. Entries include the exact hold time in order to hit the launch window based on the rendezvous target vehicle already in orbit. The countdown manual lists minute-by-minute steps in a column format labeled with header topics of time (T-), direction by, action by, operation, time (T-, again), and item (completed check-off column). INSCRIBED WITH MISSION TITLES BY TOM STAFFORD AND GENE CERNAN on the front cover.