1. Cinematography. 35 mm film. Projector spools. Specification for 35 mm film spools of 610 m capacity (38 cm size) for release prints Part 3.9.1, (3rd October 1949) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗