Based on the novels by Len Deighton, the Harry Palmer trilogy starring Michael Caine as British agent Harry Palmer, have achieved cult status since their release over 40 years ago. The first in the series, The Ipcress File won three BAFTAs including Best Film. These distinctive glasses became the visual trademark of British Agent, Harry Palmer, and are synonymous with this character.
The vendor, who was the production accountant on Billion Dollar Brain, purchased these glasses post-production and recalls that they were kept in the safe of the Pinewood Prop Stores. Although more than one pair of glasses may have been supplied for the films, the fact that they were kept in the prop store safe indicates that they were those worn by Michael Caine, and the numerous inscriptions on the box indicates useage in all three films.