Triumph-Werke Nürnberg AG or TWN, was German bicycle and motorcycle company. In 1886, Siegfried Bettmann founded the Triumph bicycle factory in Coventry, England, and in 1896 he founded a second bicycle factory in his native Nuremberg, Germany, under the same Triumph name. Both factories branched out into making motorcycles: the Coventry factory in 1902 and the Nuremberg factory in 1903.[1]

In its early decades the Nuremberg factory produced models with the same 499 cc and 545 cc four-stroke engines as its sister plant in Coventry.

Confusion between motorcycles produced by the Coventry and Nuremberg Triumph companies led to the latter's products being renamed "Orial" for certain export markets. However in the 1920's there was already an Orial motorcycle maker in Lyon, France, so the Nuremberg motorcycles were renamed again as "TWN", standing for Triumph Werke Nürnberg.[2]

After 1929 the English and German factories diverged, with the Nuremberg works making motorcycles with 248 cc and 269 cc two-stroke engines. After the Second World War Triumph made successful models including the 200 cc Cornet split single two-stroke and the twin cylinder 350 cc Boss. A split single has two cylinders but only one combustion chamber and spark plug. Triumph/TWN's production of split singles began with the BD250 in 1939 designed by Otto Rieze.[citation needed]