The GR10M/U is a medium sized nixie tube from Hivac (they used the term Digitron for their nixie tubes). It is plug-compatible with many other of the end view nixie tubes with a B13B base. Like most of Hivac’s nixie tubes, the anode grid is a distinctive gold color.
| Digit size | 15.5mm |
| Min current | 1mA |
| Max current | 3mA |
| Base | B13B |
Datasheet:
GR10M Datasheet