Altimeter MC-3, Astek Instruments, F-4 Phantom II
Here is a combination counter-pointer Altimeter, made by Astek Instruments, MS35450-1. The MC-3 Altimeters were used in most models of the US military's F-4 Phantom II's including the models B, C, D, and J. The pointer rotates to indicate altitude in hundreds of feet and the counter rotates to indicate thousands of feet. The knob rotates the barometric pressure adjustment. Measures 3.25 inches diameter and ~7 inches deep.
It is in nice condition for its age. The dial markings are clear. The glass has a slight haze but could be opened and cleaned. Should not be considered serviceable.