After World War I, BMW was forced to cease aircraft (engine) production by the terms of the Versailles Armistice Treaty. The company consequently shifted to motorcycle production in 1923 once the restrictions of the treaty started to be lifted, followed by automobiles in 1928-29.
The circular blue and white BMW logo or roundel is portrayed by BMW as the movement of an aircraft propeller, to signify the white blades cutting through the blue sky – an interpretation that BMW adopted for convenience in 1929, twelve years after the roundel was created. The emblem evolved from the circular Rapp Motorenwerke company logo, from which the BMW company grew, combined with the white and blue colors of the flag of Bavaria, reversed to produce the BMW roundel.
