Although this question is not Bob Villa type of work directly, it is indirectly related to construction and design issues. We found a "Micronta" timer installed in the wall of a house we bought. Micronta is a Radio Shack name, so we inquired at Radio Shack for programming instructions since the timer is operational. The response was they needed a catalog number which we cannot find on the unit. so I thought maybe someone out there has one of these and knows how to program it for on/off times.
It installs on a standard wall switch plate configuation, has a dial with AM/PM times, the dial has click stops, and an on/off switch just above it. It says "Programmable Light Timer" on the plate.