- Brad's vintage gas engine governor project.
- COTTA TRANSMISION COMPANY.
- EMERSON-BRANTINGHAM COMPANY
- A vintage Rockford machine shop manufacturing history project.
- A vintage Rockford machine shop manufacturing history project.
- Tractor and Gas Engine Review
- A vintage machine shop manufacturing history project.
- The Wisconsin State Capitol in Madison, Wisconsin.
- A vintage Rockford machine shop manufacturing history project.
- A vintage machine shop manufacturing history project.
- COTTA TRANSMISION ROCKFORD, ILLINOIS, CIRCA 1919.
- Ingersoll machines machining massive diesel engine blocks for diesel-electric locomotives all over the world.
- Tractor and Gas Engine Review.
- Lathe machines do not get much bigger than this Ingersoll type.
- EMERSON-BRANTINGHAM COMPANY