Starrett (Massachusetts, USA) No. 40 screw pitch gauges. This photograph is from a large selection of mainly unattributed engineering illustrations and photos which were originally published in 1936. The sizes and quality of the originals vary quite widely.

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Size: 7000px × 5556px
Location: Massachusetts, USA
Photo credit: © Preserving Printed Matter Matters / Alamy / Afripics
License: Licensed
Model Released: No

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