20mm numeric tube manufactured by Rodan

The GR-1 is a clear glass numeric nixie tube manufactured by Rodan. It has a metal base and can display the numbers zero to nine. This tube is very rare.
Brand / Manfacturer Rodan
Same Types
Likely Tyes
Symbol height in mm 20
Characters / Symbols 0-9
Decimal point none
Base / Socket 0
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 0 V
Current per Segment 2.5mA
Reccomend Resistor 15kOhm @ 170V