Two Apollo Command Module Block II components associated with the system that provided cabin atmosphere conditioning: a pressure transducer signal conditioner made by Micro Systems, Inc., measuring 3.5″ long and 1.25″ in diameter, engraved on the side: "Signal Conditioner, Transducer, Pressure, NAA/S&ID ME901-0289-1012"; and an Environmental Control Unit (ECU) controller made by Airesearch, measuring 3.5″ x 4.75″ x 2.5″, stamp-dated "Sep. 3 69," with a green Airesearch/Project Apollo label reading: "Part: Controller, 836610-2-1, Serial 108-120."
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