In the original script for the “Army of Ghosts” / “Doomsday” story, Dalek Jast was originally named “Dalek Rabe”.
The name Dalek “Rabe” was changed to “Dalek Jast” during the final re-recordings.
Some publications that had already been in preparation, such as the Doctor Who – Battles in Time collectible card game and the Doctor Who Files Dalek book, used “Dalek Rabe” as the name for this member of the Cult of Skaro, but the episode as aired and released on DVD used “Dalek Jast”.
Above – Dalek Rabe “Battles in Time” card
Although no explanation was explicitly stated as to the reason for the change from “Rabe” to “Jast” it is quite likely that this may have been due to “Rabe” sounding too much like “Rape”, especially by the time the word had been spoken through a ring-modulator.
The “name tag” or code written on the Dalek casing identifying Dalek Jast / Rabe remained unchanged
So does the code read “Rabe” or “Jast”?
Or is it simply a numeric-type designation such as “Cult of Skaro 3”?
Or could it simply be a random design that the production team thought looked quite good…
Take you pick.