Jeff has a new clock that he shared with the world on the DWF.nu forum. It is a new design for a nixie watch based on Burroughs B4998 tubes. It will include a rechargeable lithium ion which should last about 3 months. The device is 41mm wide, 19mm tall, 32mm deep and weighs about 28 grams (not including enclosure). Lastly, it will include a changing cradle for the watch.
This device also has some other uncommon features. The watch is activated by a wrist snap-shake using a magnetized ball rolling in a steel barrel. Any unintended activations are kept to a minimum by an R/C timer circuit. Setting the time is done with a rod magnet which activates a micro reed switches placed on each end of the logic section. All of this is built using CMOS logic components; just like the original LED watches of the 70’s. “I didn’t cheat and use a microprocessor. Although I did use seven very small TSSOP packaged IC’s.”