Thanks DW!
Most of the gears are Baltic Birch plywood for stability, but a couple of the small pinions are padauk. The rest of the frame and base are walnut except for a thin top layer on the base that was made from Koa. It covers the magnetic coil and has to be thin. The hands are rosewood.
It's been keeping decent time so far, but I need to tweak the adjustments. It's been running a little fast by about two minutes per hour. The speed can be adjusted by moving the weighted bob and/or adding or removing lead shot.
I don't really expect it to be perfectly reliable over the long hall though. Being made of wood it's going to be susceptible to temperature and humidity I would think.