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- Ford Speedometer, 1915 - In the early 1910s two leading vehicle instrument manufacturers combined to form the Stewart-Warner Corporation. The company supplied automobile makers with speedometers. Speedometers at this time were still optional equipment, but would soon become standard. This speedometer with mileage and trip odometer sports the Ford logo of the period.

- 1915
- Collections - Artifact
Ford Speedometer, 1915
In the early 1910s two leading vehicle instrument manufacturers combined to form the Stewart-Warner Corporation. The company supplied automobile makers with speedometers. Speedometers at this time were still optional equipment, but would soon become standard. This speedometer with mileage and trip odometer sports the Ford logo of the period.
- "Warn-O-Meter" Motometer & Radiator Cap, circa 1923 - Automobiles often came without temperature gauges before the early 1930s, so enterprising manufacturers sold aftermarket motometers. Mounted on a car's radiator, these devices measured and displayed coolant water vapor temperature, notifying drivers if their automobiles were in danger of overheating. Stewart-Warner Speedometer Corporation produced this "Warn-O-Meter" motometer in Chicago around 1923.

- circa 1923
- Collections - Artifact
"Warn-O-Meter" Motometer & Radiator Cap, circa 1923
Automobiles often came without temperature gauges before the early 1930s, so enterprising manufacturers sold aftermarket motometers. Mounted on a car's radiator, these devices measured and displayed coolant water vapor temperature, notifying drivers if their automobiles were in danger of overheating. Stewart-Warner Speedometer Corporation produced this "Warn-O-Meter" motometer in Chicago around 1923.