Auto knock testing machine, Southern California, 1931 [image 2]
Auto knock testing machine, Southern California, 1931 [image 1]
Pump being installed in test well, Southern California, 1935 [image 2]
Test run at Ascot, Los Angeles, CA, 1933 [image 6]
Cops testing brakes, Southern California, 1935 [image]
Test run at Ascot, Los Angeles, CA, 1933 [image 3]
Test run at Ascot, Los Angeles, CA, 1933 [image 22]
Testing benches, Axelson Machine Works Co., Southern California, 1930 [image]
Test run at Ascot, Los Angeles, CA, 1933 [image 19]
Test run at Ascot, Los Angeles, CA, 1933 [image 18]
Test run at Ascot, Los Angeles, CA, 1933 [image 15]
Brake testing machine, Southern California, 1929 [image 2]
Test run at Ascot, Los Angeles, CA, 1933 [image 9]
Composite of man looking at test tubes, Southern California, 1936 [image]
Test run at Ascot, Los Angeles, CA, 1933 [image 16]
Joe Nikrent testing oils for the Pennzoil laboratories, Southern California, 1934 [image 4]
Test run at Ascot, Los Angeles, CA, 1933 [image 7]
Washing machine, test lab, Axelson, Southern California, 1931 [image 4]
Testing dirty oil & stuck piston rings, Southern California, 1935 [image 1]
Washing machine, test lab, Axelson, Southern California, 1931 [image 1]
Gasoline testing machine, Southern California, 1933 [image 5]
Gasoline testing machine, Southern California, 1933 [image 4]
Gasoline testing machine, Southern California, 1933 [image 2]
Stinson Jr & executives & test pilots, Downey, Calif., 1941 [image 3]
Gasoline testing machine, Southern California, 1933 [image 3]
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