Workers resurfacing track at Packard Proving Grounds
View of workers resurfacing the track at the Packard Proving Grounds in Utica, Michigan. Typed on back: "Proving grounds, track. Top elevation." Stamped on back: "Sep 5, 1946." Handwritten on back: "Packard Motor Car Co. Proving Grounds, Utica, Michigan. Resurfacing track."