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Brand name est. year Country Manufacturer Note
Oakland -1928 USA Oakland Motor Car Co. Pontiac, Michigan
Ogle 1959-63 UK n/a
OHB 1903 UK O'Halloran Brothers. n/a
Old Mill 1914-16 UK Albert Lambourne Ltd., Millworks, Brighton,
Sussex
Olds 1897-1908 USA Olds Motor Vehicle Co. GM 
since 1908 
Oldsmobile 1908- USA General Motors, Oldsmobile Division, 
920 Townsend Street, Lansing, Michigan 48921 
www.oldsmobile.com
Oltcit 1977- Romania n/a
O.M. 1918-33 Italy Officine Meccaniche SA., Brescia
Omega 1925-27 UK n/a
Otomo 1920 Japan n/a
Olympian n/a USA n/a
Opel 1899- Germany Adam Opel AG. Bahnhofplatz 1, 
65428 Rüsselheim 
www.opel.com
GM 
since 1931
Opperman 1898-1907 UK n/a
Opperman 1956-59 UK S.E.Opperman Ltd., Elstree, Borehamwood,
Hertfordshire
Orient 1900-09 USA n/a
Orient Express 1898 Germany n/a
Orion 1914 UK n/a
Orpington 1920-24 UK Smith & Milroy Ltd., Orpington, Kent
Osca 1947-66 Italy Automobili OSCA, Fratelli Maserati, Bologna
Osi n/a Italy www.taunus.nl/OSI/nl/nl.htm
Osterfield 1906-09 UK Douglas S.Cox, Thomas Place, West Norwood,
London
Ostermann n/a Germany n/a Kit-car replica
Otosan 1959 Turkey n/a
Overland 1903-07 USA n/a Willys-Overland 
since 1907-33
Owen 1899-1932 UK Automobile Transport Co.Ltd., London
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