Three protective cover assemblies for the Rocketdyne J-2 rocket engine, including: a large 10.75" red plastic closure assembly cover for the J-2 turbopump inlet, part no. RX-20714, with a rubber gasket on the back; an 8" red plastic closure assembly cover for the J-2 main fuel valve, part no. RX-20934-11, with a rubber gasket on the back; a flexible 5" red rubber preservation and packaging cap for the propellant valve indicator assembly, part no. RX-20633-7, stamped with a date of "1Q68." In overall very good to fine condition. Accompanied by the original packaging and parts lists/diagrams showing their locations on the J-2 engine. The J-2 was a liquid-fuel cryogenic rocket engine used on NASA's Saturn IB and Saturn V launch vehicles.
