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- Description:
- Black and white photographic print mounted on fabric depicting the pre-heating end of a Jeffery Dewitt Kiln under construction at the Champion Porcelain Co. Dated Apr.-5-1919.
- Date Issued:
- 1919-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Champion Spark Plug Co.
- Description:
- Black and white photographic print mounted on fabric depicting equipment in the Department #36 Process Laboratory at the Champion Spark Plug Co. Caption on verso reads, "General view of Process Laboratory where bodies can be put into production without interfering with factory production."
- Date Issued:
- 1922-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Champion Spark Plug Co.
- Description:
- Black and white photographic print mounted on fabric depicting the inside of the cooling end of a Jeffery Dewitt Kiln under construction at the Champion Porcelain Co. Dated July 25-1919.
- Date Issued:
- 1919-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Champion Spark Plug Co.
- Description:
- Black and white photographic print mounted on fabric depicting a Jeffery Dewitt Kiln under construction at the Champion Porcelain Co. Dated July 18 1919.
- Date Issued:
- 1919-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Champion Spark Plug Co.
- Description:
- 64-page illustrated Jeffery-Dewitt Insulator Co. trade catalog. Contents include common causes of insulator failure, manufacturing methods and routine tests, suspension and strain insulators, post type insulators, and foreign installations.
- Date Issued:
- 1923-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Collection:
- Champion Spark Plug Co.
- Description:
- Certificate of membership to the National Association of Manufacturers made out to the Jeffery-DeWitt Company. Signed by organizational president George Pope and secretary George S. Boudinot. Dated New York, June 29, 1917. Lithography by the American Bank Note Co., New York.
- Date Issued:
- 1917-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Description:
- Black and white photographic print mounted on fabric depicting the preheat end a Jeffery Dewitt Kiln under construction at the Champion Porcelain Co. Dated 5-9-1919.
- Date Issued:
- 1919-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Description:
- Black and white photographic print mounted on fabric depicting a Dressler kiln control panel in the operator room at the Champion Spark Plug Co. Caption on verso reads: Taken for Dressler Co. March 1921.
- Date Issued:
- 1921-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Description:
- Black and white photographic print mounted on fabric depicting equipment in the Department #36 Process Laboratory at the Champion Spark Plug Co. Caption on verso reads, "General view of Process Laboratory where bodies can be put into production without interfering with factory production."
- Date Issued:
- 1922-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
- Description:
- Black and white photographic print mounted on fabric depicting the Raw Material Testing Laboratory at the Champion Spark Plug Co. Caption on verso reads, "The Raw Material Testing Laboratory where the raw materials are tested before being released for production."
- Date Issued:
- 1922-01-01T00:00:00Z
- Data Provider:
- Detroit Historical Society
