Sir Alec Guinness played Obi-Wan Kenobi in Star Wars

The pair have been valued at up to $140,000 (�80,000) by Beverly Hills auctioneers Profiles in History.

They are among 75 Star Wars props to be sold on 29 July.

Luke Skywalker's orange X-Wing pilot jumpsuit is valued at $80,000 (�45,000) while other lots include a Stormtrooper "blaster" weapon and Yoda's green mask.

Film archive

The lightsaber used by Darth Vader in The Empire Strikes Back is estimated to go for up to $60,000 (�34,000), while the Jedi Knight's weapon is expected to fetch up to $80,000 (�45,000).

But as the lightsabers lit up on screen thanks to special effects, the actual sabers are just short, silver-coloured tubes with a black handle.

A walking stick used in The Empire Strikes Back and Return of the Jedi by Yoda is also in the sale.

The items are currently owned by Star Wars producer Gary Kurtz who set up an archive of props with Star Wars historian Jason Joiner.

The archive contains thousands of pieces of memorabilia from the films to preserve them for future generations.