The â€˜Wilkieâ€™ Dalek – named after designer Bernard Wilkie, co-founder of the BBC Visual Effects Department – was designed for the Troughton era episodes The Evil of the Daleks and was rumoured to have a narrower skirt in order to travel through ordinary sized doors on the set.
In the 70â€™s Wilkie rediscovered his creation in a skip outside Ealing studios.
The Dalek, repaired for Exhibition purposes has been on display at the Doctor Who Museum in Blackpool which closed last year.
According to Dalek 6388, the â€˜thinâ€™ Dalek is an amalgamation of the Evil skirt and the gun box shoulder section from the redesigned Daleks of the Peter Cushing movies.
The item – along with a host of other Doctor Who merchandise both old and new – is expected to raise between Â£2,000- Â£3,000.
Evil of the Daleks was set to be the final ever appearance of Doctor Who’s greatest villains. Writer and Dalek creator Terry Nation was busily trying to sell the concept to American Television and wanted to give them a final send off from the series – only for Producer Innes Lloyd to insert a light globe inside the smouldering ruins of the Emperor Dalek, suggesting that their were still confrontations to come.
Sadly, Evil of the Daleks was wiped from the BBC’s archives in the early 1970s.
Only a telerecording of episode 2 remains, returned to the archive in May 1987 after being found at a car boot sale a few years earlier,
A second version with alternative narration was released in 2003. A home movie of the filming of the Dalek battle sequence exists and is included on the DVD of The Tomb of the Cybermen.
(Via Doctor Who News)