A liquid oxygen injector from a V-2 rocket motor. Injector is shadowboxed against an informational background and framed to an overall size of 4.5 x 4.5. The rocket engine was fueled by an alcohol and water combination, with liquid oxygen serving as an oxidizer that enabled the fuel to burn. The fuel and oxidizer were pumped into a main combustion chamber where they mixed and then ignited. RRAuction COA.