TOKYO CLOCK Stopwatch. One revolution is 60 seconds. It is a hand-wound type, so please wind the crown on top to use. Like a general stopwatch, press once to start, press again to stop, and reset with the button on the upper left. Size: Face diameter: Approximately 5.0cm Please allow for some margin of error. There are some minor scratches, scuffs, stains, and dirt due to use and aging. The photos mainly show noticeable scratches and dirt, but there may be other scratches that are not visible in the images. Please understand this beforehand. As this is a used item, please refrain from purchasing if you are looking for a perfect product.