Every time I see this old clock, I'm reminded of junior high shop class. This was the second project that I completed that year. I can still remember attaching the number and assembling the moving parts. At the time, I thought that the motor would only last about a year because the internal gears and parts are made of plastic. I am amazed that it still works to this day and keeps perfect time. Even more amazing is the battery life that we got from a single AA battery. I installed the original battery in the latter part of 1981 and it managed to hang on until around the year 2000. I wouldn't have thought it was possible but I seen it with my own eyes.