Apollo Lunar Module Ground Support Equipment (GSE) back pressure regulator valve, measuring approximately 2.75″ x 5.75″ x 4″, marked on the body: "Vacco Valves…Regulator, Back Pressure, BFRD-32133, LSC 430-77706-3, NAS9-1100…Assy Date 1-Q-67," with flow direction marked below. In fine condition.
