The company was founded as Stewart & Clark in 1905 and was a manufacturer of vehicle instruments such as gauges for dashboards, among many other products. It made the speedometer for Ford Model T and in 1912 company name was changed to Stewart-Warner. The location of its plant in San Francisco is unknown at this time.
Area: San Francisco
Year: circa 1930
Marty Drury is in middle of picture between front and back rows