Military-grade 16K core memory module built by Litton Systems, measuring 11.5″ x 3.5″ x 11″, with rack-mountable faceplate marked "16K Memory" at the top, featuring two electromechanical bank/port selection buttons on the front. The rear bears its manufacturer's label: "Core Memory Asst, 16K, Litton Systems Inc., Data Systems Division, Assy 548254-101, Ser: 259, P/O 547752-102." In fine condition. An interesting piece of early computing history.