20.5mm numeric tube manufactured by National Electronics

The NL-8423 is a clear glass numeric nixie tube manufactured by National Electronics. It is identical with the B-6091 from Burroughs. This tube has rather large digits with 20.5mm height.
Brand / Manfacturer National Electronics
Same Types
Likely Tyes
Symbol height in mm 20.5
Characters / Symbols 0-9
Decimal point none
Base / Socket B13B
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 140 V
Current per Segment 2.25mA
Reccomend Resistor 12kOhm