Apollo Command/Service Module electronics package, measuring 6″ x 3″ x 4″, with a parts tag on the top, reading: "Item Name: Electronics Package, S & ID Control No. ME431-0019-0006…Manufacturer: Pioneer Magnetics, Mfr. Serial No. 1836, Mfr. Part No. PM 1459." The front of the unit has yellow-capped ports marked "J1" through "J4," and smaller ports with screw-caps marked "R1" through "R3." In fine condition.