8.5mm symbol tube manufactured by NEC

The LD8017 is a clear glass symbol tube manufactured by NEC. It can display the plus and minus sign, the electrical units Omega (for Ohm) and sinewave for AC current. There is also a symbol looking like laying "O" and a sign that looks like a sawtooth symbol! This tube is very rare and special. If you have more info about this tube or the devices it was used in, i would be happy to hear about!
Brand / Manfacturer NEC
Same Types
Likely Tyes
Symbol height in mm 8.5
Characters / Symbols +,-,sinewave,saw-tooth,Ω 0
Decimal point none
Base / Socket L9S-1
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 0 V
Current per Segment 1.2mAmA
Reccomend Resistor 15kOhm @ 170V, 91kOhm @ 250V, 150kOhm @ 300V according to datasheet