From the record
“The Packard Proving Grounds, was a proving ground established in Shelby Charter Township, Michigan in 1927 by the Packard Motor Car Company of Detroit. It is listed in the National Register of Historic Places.”
Wikipedia article Packard Proving Grounds, CC BY-SA 4.0.
One of 15 National Register listings published here for Macomb County · listed in 2007 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service



