- COTTA TRANSMISION ROCKFORD, ILLINOIS, CIRCA 1919.
- COTTA TRANSMISION COMPANY.
- EMERSON-BRANTINGHAM COMPANY
- EMERSON-BRANTINGHAM COMPANY
- A vintage machine shop manufacturing history project.
- Brad's vintage gas engine governor project.
- Tractor and Gas Engine Review.
- A vintage machine shop manufacturing history project.
- Tractor and Gas Engine Review
- A vintage Rockford machine shop manufacturing history project.
- A vintage Rockford machine shop manufacturing history project.
- A vintage Rockford machine shop manufacturing history project.
- An Ingersoll Milling Machine Company Manufacturing History Project.
- A Growing International Manufaccturing Company.
- IT All Began In Rockford, Illinois...