Apollo Saturn V Third Stage Cold Helium Solenoid Valve made by Calmec Manufacturing Corp., measuring approximately 1.75″ x 6.5″ x 3.25″, with a NASA George C. Marshall Space Flight Center plate at center: "Valve, Solenoid, Cold Helium, Assy No. 549, DAC Spec. 7851845515, Contr. No. NAS7-101, Ser. No. 0037, Date 4/65." The valve has blue anodized screw-on caps for the inlet, outlet, and vent ports.
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