There are a black and a white wires that are coiled in the battery compartment, that do not appear to be original, and that are terminated in unsoldered, twisted-wire connections to short pieces of black and red wire. The black and red wires are only approximately 1/2-inch long stubs.
Texas Instruments Incorporated (TI)
3921142 Patent Pending
MC written in pencil inside battery compartment
X122.82b is written in silver ink on the back of the object