Tested and works. Has scratches and some wear from use.
Does your transformer have only one sound option (whistle) but your trains have Bell as well? This is the button you need to add on to your Lionel trains to be able to activate that secondary sound.
NOTE: This switch is designed for use with common ground wiring. It is not to be used with a Lionel #6-4690 Type MW transformer. For proper installation, refer to RailSounds instruction manual.