Original Nixie displays (first introduced in 1955), might have been replaced by the modern seven-segment LED, but American Innovative is bringing them back in dazzling fashion. The AI Nixie Clock combines vintage design with modern technology, including configurable time and date formatting options and animated transitions like fade, twinkle, marquees, curtain, and shuffles. You can purchase a fully-assembled version, or go out on an adventurous limb and purchase a kit to build one yourself (it will take about four to eight hours to build and you'll need access to a smoldering tool). The pre-made clock isn't just hand-built for you though, it's also special because each one is given a limited edition serial number label and registered to you in their database.