I was testing the hyperlapse function on my Samsung Galaxy S10E & managed to record the sunlight hitting the watch hands and causing a bright explosion of sunlight into the camera. Zaratsu is a highly skilled & artisan method of hand polishing that is undertaken By Japanese masters at the Grand Seiko Factory. This level of polishing creates a watch that not only sparkles like a diamond but also makes the watch highly legible in low light compared to other watches. Sunlight hits the hands around 16 seconds into this short video.