Here are my few clocks.
don't be too severe, I just started 6 month ago.
The first I bought. From Ukraine, electronic from Kiev (blackalex1973) and IN-14 tube from Donetsk, case from me.

QS30-1 from Hong-Kong and electronic from ali-express. the red Led color is not working on the third digit, sending back the device for repair is half the price of the electronic...
case home designed in one piece.
this one is made with IV-3 I bought with the IN-14 and a pcb I got from ebay (bobricius). There is an arduino uno under, I will make one smaller and rebuild the case.
are waiting some IN-4, IN-12b, IN-14, IV- 6, IV- 12, IV-18...
and a few IV-4 and IV-17 to make a multipurpose display, connected to HomeAssistant for time, date, meteo, temperatures and so on.
I will be busy for a while !!! ;-)
Benoit.