This lot will be auctioned on Tuesday, November 9th. The auction will begin at 3:00pm GMT and lots are sold sequentially via live auctioneer; tune in to the live streaming broadcast on auction day to follow the pace. Note other lots in the auction may close on November 10th or November 11th.

Tron's (Bruce Boxleitner) helmet from Steven Lisberger's sci-fi adventure Tron. Alan Bradley's security program, known as Tron, wore his helmet throughout the film, in the neon-tinged digital world of the ENCOM mainframe. He teamed up with software engineer Kevin Flynn (Jeff Bridges) and the program Yori (Cindy Morgan) to stop ENCOM's Master Control Program.

Tron is a truly groundbreaking movie, being one of the first productions to feature entirely computer-animated sequences. However, most of its iconic visual effects were created using matte-photography techniques and backlit animation. The actors were shot in black-and-white on a black background, then printed on large, high-contrast film and hand-coloured using rotoscoping. This process proved to be so complicated and costly it was never again used for a feature film.

The lot comprises a custom-made helmet, modelled after a hockey helmet, made of white-coloured vacuum-formed plastic, to which a white-painted foam liner is attached via four metal screws. It is covered in black tape, which forms intricate circuit-board decals. Incorporated into the circuitry designs are sections of transparent tape featuring black dots, which glow when the helmet is placed under UV light.

The helmet's interior is labelled "Tron", while "Bruce #2" is written in black ink on the front of the foam liner. Some decals have begun to peel or are missing, and cracking is present on the foam. This lot should be handled with care, as the back of the helmet is fragile. Dimensions (displayed): 23 cm x 21 cm x 34 cm (9" x 8¼" x 13½")

Estimate: £30,000 - 50,000 M