Saturn V/IB upper stage command decoder assembly, measuring 8″ x 6″ x 3.25″, with a George C. Marshall Space Flight Center plate on the side: "Decoder Assembly, Channel Calibration Command, Assy No. 421001-3, DAC Spec. IA74053-503, Contr. No. NAS 7-101, Mod. No. 4214, Ser. No. 391." Stamped on the top panel with a test date of July 31, 1972. In very good to fine condition.
From The Peter Gerry Collection.
