Three Vibroplex Morse Code Telegraph Keys - Chrome And Champion A small group of three Vibroplex telegraph keys in poor condition for parts or restoration. A Vibroplex Bug telegraph key with brass identification plate serial number 191820, measuring 3 1/2" x 6 3/8", showing moderate rust to the chrome frame, and tarnish to some screws and springs. A Vibroplex Bug on 3 1/2" x 6 3/8" cast iron base, stamped on the bottom Champion, showing tarnish to the brass identification plate serial number 237553, rust to the base, and missing parts. A Vibroplex key on 2 1/2" x 5 3/4" base with identification tag serial number 55793, showing mild rust, discoloration, missing parts, and drill holes to the base. See photos for best description.