1972-73 Mustang Speed Sensor.  This Speed sensor fits on the speedometer cable on the late 72 and 73 Mustangs.   This was added when the addition of the emission systems came along.   The sensor on this one is is good shape along with the connector, but the wiring going into the connector will need some attention.  You can remove the pins, fix the wires and put the pins back in.   If you are missing your speed sensor, then this is for you!!!