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