Manufacturers ----------------------------------------- O OCMA (Devil) Italy OD (Germany 1927-1935) O.E.C. (England 1901-1954) Ogar (Czechslovakia) Ok Supreme (England) OMC (England 1930) Omega (England) Opel (Germany) Orient (USA 1900-1906) Orionette (Germany) OSA (Poland) Ossa (Spain 1951-1984)