Apollo Command Module rocket engine, model SE-8. Approx. 14 in. long and 5.5 in. wide at nozzle base. A Rocketdyne ID tag reads in part: Propulsion System Component, Part Name: Rocket Engine 9:1 Assy, Part No. 106001, Model No. SE-8, Customer Serial No. 0G3G00844108, MFG. Serial No. 4059755. A set of 12 of these bi-propellant engines provided the Command Module with rotation control, rate damping, and attitude control after separation from the Service Module before and during reentry. There are fuel and oxidizer valve assemblies at the top and an ablative nozzle at the bottom.