"borrowed" the basic shape from this: The drawing is what I came up with after fiddling around with dimensions. Usually I don't make plans but for this I wanted to be sure everything fits before cutting.
I did make a tapered top version years ago (I feel the top was overly big) Camera white balance was wrong, it is actually cherry with a walnut wedge + copper face
Movement is one of the old hydrogen maser clocks from work, the hydrogen line connects at the back.
The back is a lift out (slide up then tilt out). I designed it with the bottom frame member surrounding the tile to be held in with screws to allow the glass and tile to be slid out if needed.
