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1926. Washington, D.C. "Four Wheel Drive Auto Co. oil truck, H Street N.E." My favorite detail here: "Minimum Labor Charge 50¢." View full size.
Man to drive oil truck with loud horn, suit and hat required.
The two dome-topped cylinders between the radiator grille and the front bumper are probably early versions of hydraulic shock absorbers. Similar designs -- perhaps less robustly constructed -- were available as aftermarket accessories for passenger cars in the late 'Teens and early '20s. We tend to take shock absorbers for granted these days, but early cars which lacked them tended to rebound for a considerable time after encountering a bump or pothole; this is not only uncomfortable but also inimical to keeping the tire in contact with the road surface.
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