Actual photos.
One tube or more.

Decathron A-108  counting for operation in counting and computing devices. The color of the glow is violet-blue. Weight 15 grams.
     Basic data
Conversion factor ............ .....................................10
The occurrence of a discharge at ........................ not less than 250 V
Supply of discharging voltage ............................ 125-145 V
The amplitude of the discharge voltage pulse .......70 V
Operating current ................................................. 0.7-0.9 mA
Control impulse data
Counting rate ........................ 0-15000 Hz
The pulse amplitude .................. not less 18V
 Duration of the front.................not less 70mсsec
Minimum operating time ............. not less 2000 hours.

Pinout.
1. Cathode # 5
2. Catodd #4
3. Cathode # 3
4. Cathode # 2
5. Cathode # 1
6. Cathode #0
7. Cathode - not connected
8. Cathode # 9
10. Cathode # 7
11. Cathode # 6
12. Anode