This British Film Council production from the 40s looks at the processes involved in the manufacture of optical lenses. https://youtu.be/pulHXjeycPU Judging by the look of the lenses, the opening scene was filmed in the Cooke factory. (Sam is a lens nerd. He can tell 😉
Let’s See 👀 Optical Lenses- 1940 British Film Council Production on the manufacture of lenses
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