New Haven Combined Key and Sounder
New Haven Key/Sounder
This unusual telegraph instrument was, supposedly, manufactured by the New Haven clock company.  It combined a conventional key and sounder into one compact instrument.  This innovation was patented on Feb. 14, 1888 (patent number 377862, issued to B. Oehmen).

Unfortunately, this unit is missing some pieces, and some of the pieces that remain are not original.  Most of the original nickel plating is intact, however.