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/ManfacturerWang Lab
Same Types
Likely Tyes
Symbol height (mm)15.5mm
Decimal pointnone
Starting Voltage (typ)170 V
Maintaining Voltage (typ)0 V
Current per Segment3mAmA
Reccomend Resistor8.2kOhm @ 170V