Here is another Nixie clock that turns heads. The Numitron IV-9 Nixie Clock has vacuum incandescent low voltage lamps to show the time. It supports 12/24h format. It also shows you the temperature. The clock gives you accurate readings by connecting to NTP and Openweathermap.org servers.
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You can configure this clock using a simple web interface. It is powered by a 5v power supply.
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