Miniature desk orrery.
I’m made many orreries, well sculptures inspired by orreries really. They don’t move by mechanical means - just look like they would if they were a real machine. Well this one can move - you can carefully position the planets to where you want them. I’ve used vintage clock, pocket watch and watch gears of different sizes, vintage brass stamps, beads and turned brass components. It looks simple enough but there are many, many hours of trial and error in this - finding the right material for the “arms” was difficult. It’s available in my etsy shop.