After the Daleks failed to invade Earth they made their own time machine to find the Doctor and exterminate him. These Daleks have solar panels on their mid-section which replaced the disc and allowed them to travel anywhere.
These Daleks appeared in the following TV stories: The Chase (1965), Mission to the Unknown (1965), The Daleks’ Master Plan (1965), The Power of the Daleks (1966) and The Evil of the Daleks (1967).
Pictures above are from the TV stories The Chase and The Daleks’ Master Plan
Pictures above are from the TV stories The Power of the Daleks and The Evil of the Daleks
Daleks conquer and destroy! Daleks conquer and destroy!