Navigation computer control box (CP723B/ASN-46) built by the Bendix Corporation for the McDonnell Douglas F-4 Phantom II fighter jet, measuring 5.75″ x 6.75″ x 7.5″, with Bendix plate on the reverse: "Computer-Control, CP-723B/ASN-46, Part No. 17319-2J, Contract No. F33657-69-C-0319, Serial No. 6605-836-5335." The elapsed time ticker on the side reads "4395 Hours," and affixed service tags indicate the unit was overhauled on September 8, 1988. This unit, part of the F-4's Inertial Navigation System, would be used by a Radar Intercept Officer (RIO) to dial in the latitude and longitude of up to two different targets. This item is ITAR restricted; no export or sale to non-US citizens.