Print, Photographic

Black and white photographic print depicting a product display at the Champion Spark Plug Co. Items are labeled, "Small Diamond Wheels", "Norbide Ring Gages", "Bore Gaging Setup", and "Diamond wheel, The largest size made is used exclusively by Champion".
Typed on verso: Champion "Open House" - Sunday, October 26, 1947.
Department #16 - Centerless Grinders.
Prepared by: Mr. G.C. Vincent, Foreman.
The 20" diameter diamond wheel in the center of the photograph contains approximately 500 carats of diamonds in the periphery. We are the only customer for these wheels. We ground the Norbide ring gauge shown in the picture using the smaller wheel shown at the left.