I made this pin back in 2009 in a jewelrymaking class. The idea was to make a brooch using parts and materials other than just new metal. I used copper for the backing, sanded a piece of mahogany rosewood for the body, the horns are made of sculpey, and I took apart some small watches to get the gears, hands, and face. The hands on the clock face can still be moved freely, and the large gear also turns.
No soldering whatsoever, and the only glue used was to attach the sculpey horns to the wood, but then they were clamped in place by the copper backing. It's mounted on a miniature canvas, so the canvas isn't part of the pin, which is about 2 & 1/2 inch, or 6cm from horn tip to base.
If anyone could tell me the metalsmithing term for inserting copper wire and silver tubing into drilled holes and hammering the ends flat to attach pieces together, that would be great, because I've totally forgotten what it's called!