A-Z of Motorcycling
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O

O&H: 1912-15 Australia
OASA: 1930-32 Italy
OB: 1904-07 Austria
OBERLE: 1927-29 Germany
OCMA (DEVIL): 1953-57 Italy
OCRA: 1923-25 Germany
OD (Ostner Dresden): 1927-35 Germany
ODA: 1925-26 Germany
ODRA: 1957 Poland
OEC: 1901-54 UK
OFRAN: 1923-25 Germany
OGAR: 1934-50 Czech
OGE: 1921-24 Germany
O'GRADY: 1902 Australia
OGSTON: 1911-13 UK
OHB: 1927-28 Germany
OK (OK-SUPREME): 1899-1939 UK
OKEY: 1910-16 Australia
OKUR: 1922 Germany - see ORUK
OLIVA: 1920-25 Italy
OLIVERIO: 1929-32 Italy
OLIVOS: 1920-21 UK
OLLEARO: 1923-52 Italy
OLMO: 1951-61 Italy
OLYMPIC: 1903-23 UK
OLYMPIQUE: 1922-58 France
OLYMPUS-KING: 1956-60 Japan
OM: 1923-25 Germany
OMA: 1952-55 Italy
OMB: 1933-34 Italy
OMC: 1933-35 Italy
OMC: 1930 UK
OMEA: 1950-53 Italy
OMEGA: 1909 UK
OMEGA: 1919-27 UK
OMEGA: 1960's Japan
OMER: 1968- Italy
OMN: 1924-25 Italy
OMNIA: 1931-33 Germany
OMT: 1949-53 Italy
ONAWAY: 1904-08 UK
ONOTO: 1922-54 France
OPEL: 1901-30 Germany
OPITZ: 1912 Australia
OPRA: 1927-29 Italy
OR: 1928-31 Italy
ORBIT: 1913-24 UK
OREOL: 1903-WW1 France
ORI: 1923-25 Germany
ORIAL: 1919-26 France
ORIAL (see also Triumph and TWN): 1929-31 Germany
ORIENT: 1900-c1906 America
ORIGAN: 1933-Early 1950's France
ORIGINAL-KRIEGER: 1925-26 Germany
ORIOL: 1915? Australia
ORION: 1902-33 Czech
ORIONE: 1923-28 Italy
ORIONETTE: 1921-25 Germany
ORIX: 1949-54 Italy
ORLE: 1939 Poland
ORMONDE: 1900-c1906 UK
RNEN: Sweden
ORTLOFF: 1924-26 Germany
ORTONA: 1904-06 UK
ORUK: 1922-24 Germany - 190cc sv, rear wheel mounted, also called Okur
OSA: 1958- Poland
OSA-LIBERTY: 1926-32 France
OSCAR: 1953-55 UK
OSCAR: 1965-82 Italy - Morini or Minarelli engined machines
OSCHA: 1924-25 Germany
OSMOND: 1911-24 UK
OSSA: 1951- Spain
OSTNER DRESDEN (see OD): 1927-35 Germany
OTTEN: 1901-11 Netherlands
OTTO:
1921-37 Germany
OTTOLENGHI: 1928-32 Italy
OVERDALE: 1921-22 UK
OVERSEAS: 1909-15 UK
OZTRIKE: 2000-? Australia