Jack, 1/4-inch phone, stereo, open-circuit.
Western Electric 238CM
Jack, 1/4-inch phone, stereo, open-circuit. Switchboard-style, non-insulated, unthreaded collar, 0.45-inch diameter, 0.55-inch length. Depth behind panel, 3.32-inch; wirewrap terminations. Accommodates standard 1/4-inch diameter stereo plug. One-hole mounting tab on collar face.