Ausjim has the right idea. More game will be alerted by reflection off the watch’s crystal than by sound the watch makes. That’s especially true for the stalking hunter but can happen any time your hand moves. When we use to hunt the open mountains and tundra and split up to hunt opposite sides of the valley one of the easiest ways to locate the other others across the valley was to watch for that flash of light off their watch’s face (or any other reflective surface that wasn’t covered). I always used either a watch band with a cover or used a pocket watch.