Goth's TARDIS

The TARDIS belonging to Chancellor Goth was stolen by the Master after he killed Goth. (TV: The Deadly Assassin) It was a later version than the Type 40s.

The Master used it's identification to pass through the transduction barrier on Tersurus and steal information on the Dimensioneers. Afterwards, he disguised it as a police box to mimic the Doctor's TARDIS and fool people into thinking he was a future incarnation of the Doctor. (AUDIO: UNIT: Dominion)

It may likely have been the TARDIS the Master used to escape his Melkur TARDIS when it was destroyed. (TV: The Keeper of Traken)