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Dinosaur skull and robot up for auction

23 August 2013 Last updated at 06:55 BST

A dinosaur skull and a glass model of Charlie Chaplin are just some of the items going under the hammer at Christie's auction house.

The Out of the Ordinary sale features a collection of weird and wonderful items ranging from a couple of hundred pounds to hundreds of thousands.

A public exhibition has been curated ahead of the sale in early September. Sophie van Brugen reports.