14mm symbol tube manufactured by Siemens

The XN10 is a clear symbol tube manufactured by Siemens. It can display the plus and minus sign, and a sine-wave symbol as well. It is very similar to the ZM1133 which was also manufactured by Siemens. It is very rare, because no Information was found about this tube, but the specifications seem to be the same as for the ZM1133
Brand / Manfacturer Siemens
Same Types
Likely Tyes
Symbol height in mm 14
Characters / Symbols +,-,sinewave
Decimal point none
Base / Socket SK-116
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 140 V
Current per Segment 2mA
Reccomend Resistor 15kOhm @ 170V