It is debatable whether a clock is a desirable item at a home library. After all, library is a space where you may want to be free from the constraints of time. Things are a bit different if the clock you put on the shelf or on the desk is actually a curiosity of note. Being able to tell time would be an added feature, nothing more. Atmos clock is just such a curiosity. These clocks never have to be wound up. They simply use slight variations in atmospheric pressure, while actually keeping time in a very reliable way. Atmos clocks are Swiss-made! They can still be found at antique stores or you may be able to locate a clock by a different manufacturer.