When I got my grandpa’s band saw I promptly set to work cutting out some 300 gear teeth for my clock. Each gear is made of four, five or six pie pieces that are glued together. The escapement gear has insert teeth, I thought it would be likely that one would break and it would be a lot easier to just replace one tooth than remake the entire gear. I used the miter saw to cut all the pieces for the face.
To clamp the dodecagon, I screwed twelve 2×4 segments to a sheet of plywood, on the the inside of the dodecagon, and used one clamp on each face putting the whole shape in compression.
All the joints in the frame that hold the gears and face to the wall are connected with pocket screws. Three axles are on bearings and two are just lubed steel rods.