There are kits for sale or also complete PCBs with all the parts soldered:

The side is in German, but I'll answer in English, if you send my a mail. Cases are availible in anodized aluminium or wood (walnut and beech). The battery lasts more than two years now. There are different languages implemented (German, English, Dutch and others). You can show the time, date (as big number or running text), battery power, seconds. There is a manual time correction implemented, 4 different brigthness modes and even a night mode, where you can reduce the brightness. So everybody who is interested, let's get in touch!