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Creation date / 2019 / Week 48
- A machine shop manufacturing advertisement from 1923.
- A vintage Rockford, Illinois machine shop manufacturing history project.
- INGERSOLL AD.
- American Machinist manufacturing history project.
- MADE IN THE U.S.A.
- WHO'S WHO...
- WHO'S WHO...
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- Vintage machine shop manufacturing history project.
- Arrow shows the herringbone gears.
- WOODWARD HERRINGBONE TYPE GEARS
- Some of Woodward's largest oil pump gears manufactured for hydraulic governor control systems.
- Massive harringbone gears added to the governor collection.
- INGERSOLL ADVERTISEMENT.