15.5mmmm numeric tube manufactured by Wang Lab

The 340-0004 is a clear glass numeric nixie tube manufactured by Wang Labs. Wang Labs made calculators. Its very similiar the NL-840, and its really likely that this tube was manufactured by National Electronics for Wang, because the printing on the tube is identical style.
Brand / Manfacturer Wang Lab
Same Types
Likely Tyes
Symbol height in mm 15.5mm
Characters / Symbols 0-9
Decimal point none
Base / Socket RTS-14
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 0 V
Current per Segment 3mAmA
Reccomend Resistor 8.2kOhm @ 170V