The Clock is a Create heavy build, modeled after an old pocket watch. You can tell the daytime by reading the top roman number and looking where the star is pointing. At noon, both plates point upright.
The energy source is in the far right in the winding knob. Important Configuration points are accessible from the inside cat walks.

Uses Create Deco for the catwalks and Oh The Biomes You'll Go for the embur material (slabs and stairs) and Palm Trapdoors.