Extremely rare original operations manual titled “Project Mercury Spacecraft 16 Flight Operations Manual,” contract NAS 5-59, basic date August 1, 1962, and revision date August 10, 1962. Manual is in its original three-ring binder, measures 10.25 x 11.5, and contains over 100 pages. The title page states, “This document contains astronaut and ground controller information,” and bears printed signatures of four officials, including Sigma 7 astronaut Wally Schirra. Manual is full of flow charts, check lists, and procedures towards the lift-off of the vehicle. In very good condition, with scattered soiling (heavier on the first page) and toning, and expected light handling wear. RR Auction COA.