~10mm symbol tube manufactured by RTC

The ZM1263 is a clear glass symbol nixie tube manufactured by RTC. It has a very special spiral symbol, i currently have no info for what the spiral symbol is used or any other information about the tube. There is another tube, the ZM1262 which has the same symbols.
Brand / Manfacturer RTC
Same Types
Likely Tyes
Symbol height in mm ~10
Characters / Symbols +,-,spiral,sinewave
Decimal point none
Base / Socket 0
Starting Voltage (typ) tested at 170V, 10kOhm V
Maintaining Voltage (typ) 0 V
Current per Segment 0mA
Reccomend Resistor 0