Emperor Type 1

From Tardis Wiki, the free Doctor Who reference

Despite not being a Dalek himself, (TV: Resurrection of the Daleks) Davros, the Kaled scientist responsible for the creation of the Daleks, was housed in a distinct casing during his time as leader of the Imperial Daleks, designated the Emperor Dalek. (COMIC: Emperor of the Daleks!, TV: Remembrance of the Daleks)

History

Returning to Skaro from Spiridon, Davros successfully usurped control of the Dalek Empire from the existing Emperor Dalek, only to be gravely wounded by Abslom Daak, who used his chainsword to cut Davros' life-support chair in half. Following this, what remained of Davros' body was salvaged by his loyal Imperial Daleks, who housed him within a specially made casing as he was named the new Emperor Dalek. (COMIC: Emperor of the Daleks!)

It was from within the casing of the Emperor Dalek that Davros led the Daleks from the Imperial Dalek mothership during the Shoreditch Incident. Contacted by the Seventh Doctor, Davros opened up his dome to reveal himself in their televisual meeting. Soon after, Davros was forced to use an escape pod to evacute the mothership, which was destroyed by the Hand of Omega. (TV: Remembrance of the Daleks)

By the outbreak of the Last Great Time War, a new Emperor ruled the Daleks. (PROSE: Birth of a Legend) Meanwhile Davros remained an asset to the Daleks, with his chair being reconstructed. (TV: The Stolen Earth)