Here is a cool gift idea for Nixie fans. The Makenology Luna Nixie Tube Clock doubles as a Bluetooth speaker. It uses IN12 tubes to display time and date. It has a modular design, so you can install and make changes easily. This clock uses a RTC chip to keep accurate time.
The Makenology Luna Nixie Clock also has a 15W x 2 Bluetooth speaker system. It can show the time in 12/24 hour mode. You can find out more about it here.