Nice.
Do you mean IN rather than IW.
I have made a few nixie clocks, but as usual those that build them from scratch put them in less nice cases.
I have a similar tube to that, its a little smaller than the popular ice tube clock, I have written a radio controlled program for it and protoyped it with an led display but never got round to building the final design with the tube.
What did you use for the voltage inverter, a 555 or a proprietry power supply chip?