Two circuit card assemblies mtd back to back on a page frame secured by two captive screws, c/o capacitor 9, connector 2, contact 2, microcircuit 66, oscillator unit, crystal 1, printed wiring board 2, page frame 1, resistor 6, 7.980 in. O/a lg, 3.192 in. O/a w, 0.420 in. Max o/a h