Joining in on the nostalgia theme, in addition to those mentioned I have a Westclox appliance module with only a Housecode wheel. The Unit code is fixed at 13. They were originally included as part of an alarm clock that would turn on the coffeemaker when the alarm sounded and then the modules were sold as surplus. I also have some the original BSR 16 unit controllers with Ultrasonic remotes that use 9 volt batteries. Although I don't use them anymore, they all work. I also had various modules branded IBM, Leviton, and GE. I had a couple of the NuTone 16 button remotes and remember they came with wall mount brackets.