This is the key only for the early style Splitdorf switch. (T-4637) U.S.A.
Coil box insulator for Splitdorf coil boxes. Insulator has female threads in the end and includes the male threaded mounting base. Brass screws for attaching the mounting base are included. End of insulator has SPLITDORF, NEW YORK in raised letters as original. U.S.A.