Ugears - Aero Clock - Hard LevelAssembly Time 9 16 hours Level Advanced Number Of Parts 320 Model Size 29*55*40 cm The Aero Clock isn't just a 3D wooden mechanical model, or a pretty showpiece. The Ugears Clock is an actual working clock that you can build yourself, mount to a wall, wind up, then watch as the seconds, minutes, and hours tick by. The Aero Clock is an ingenious puzzle and DIY clock mechanism, unlike any other clock. It is a lovely piece of precise engineering that