Apollo Command Module (Block II) Data Modulator, measuring 4.25″ x 4.5″ x 8.25″, with a Motorola label on the side, reading: "Item Name: Data Modulator, NR/SD Cont No: ME478-0087-0002…Date of Mfr: July 70." There is a NASA inspection stamp near the tag and a white NASA seal over the bottom plate. The sides are stenciled "Eng. Test Only," and one side has ports marked "J1" and "J2." In fine condition.
