This clock is very similar in size, shape and circuitry to one I designed in 2001. I sold it without a case, so that people could stick it in whatever piece of driftwood or old walnut cabinet they could come up with. The only one I have left, I put in a rackmount case with a rubidium time source.
I'm glad to see that it's being offered as DIY instructions rather than as a kit, to get people thinking about doing all the fabrication work themselves. It's a good way to pass some spare time.