Bonhams : 1898 De Dion Bouton 1 3/4hp Tricycle Engine no. 7.B.211.97
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Legendary Motorcycles - 1898 De Dion-Bouton Tricycle, built in France 1896-1901. Regarded as the 1st mass produced motorcycle, 15,000 units sold. | Facebook
F/S 1900 De Dion Bouton/Orient motorcycle,tricycle,quadricycle engine. - Motorcycles - All - Antique Automobile Club of America - Discussion Forums
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De Dion Bouton motor tricycle | Science Museum Group Collection
File:Georges Bouton on 1895 De Dion-Bouton Tricycle prototype.jpg - Wikimedia Commons
1898 De Dion Bouton 1 3-4hp Motor Tricycle – The Online Bicycle Museum
De Dion-Bouton tricycle - Wikipedia
De Dion-Bouton Tricycles
Classic Motorcycle Archive
In Australia – 1898 De Dion Bouton 1 3/4hp Tricycle | Bike-urious