Gear Tower Clock is a clock mechanism. It is built as a free-standing tower of six sets of gears. Due to some mechanical-engineering magic, the gear tower stands tall and does not topple. The dials of the clock can be turned with a crank.
Watch the YouTube video.
Watch the motorized version as well.
Buy the base for the motorized version.
Buy the motorized version with seconds hand.
Read at the Shapeways Forum.
Read more at the Non-Twisty Puzzles Forum.
Read more at Reddit mechanical gifs
Please order a 3D-printed do-it-yourself gear kit from Shapeways at this page (check with Oskar about screws and stickers), or contact Oskar directly if you are interested in obtaining a fully colored, stickered and assembled sample of this contraption.