Douglas (motorcycles)
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Douglas was a British motorcycle manufacturer from 1907 to 1957 based in Kingswood, Bristol, owned by the Douglas family, and especially known for its horizontally opposed twin cylinder engined motorc
1919 Douglas cyclecar
A Douglas motorcycle
Douglas DT 500 cc, 1929
Harley-Davidson Model W
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The Harley-Davidson Model W, also known as the Sport Twin, is a motorcycle made by Harley-Davidson from 1919 to 1923. Unusually for a Harley-Davidson motorcycle, the Model W had a flat-twin engine and
1921 Harley-Davidson Model W
W. S. Harley's patented compression release system. Note the screw caps in the cylinder heads giving access to the valves.
1922 Harley-Davidson WJ
Beam-framed motorcycle with Model W drivetrain, patented by W. S. Harley and A. Ziska Jr.