This pocket watch is about 100 years old and still works well. You can see the outline of one of the main gears as it spins on the bottom edge of image.
I think some of the things I like about this shot are the patterns that the light makes as it hits the surfacing marks on the various pieces. You get those nice swirls where they've machined the gear faces and the diagonal lines where the light interacts with the machining marks in the larger flat areas. Well done.