The CD47 (or GR-414) is the largest nixie tube in the world, with a digit height of 135mm. It seems to have been used in weigh-stations, as there are symbol tubes of the same size with the symbols Kg and t.
| Digit size | 135mm |
| Anode current | 17.5mA |
| Max current | 32.5mA |
| Base | TSB-12P |
Datasheet for the GR-414
1974_ED4907-AA-1