Daimler was awarded a Royal Warrant to provide cars to the British monarch in 1902; it lost this privilege in the 1950s after being supplanted by Rolls-Royce. Daimler occasionally used alternative technology: the Knight engine which it further developed in the early twentieth century and used from 1909 to 1935, the worm gear final drive fitted from 1909 until after the Second World War, and their patented fluid flywheel used in conjunction with a Wilson preselector gearbox from 1930 to the mid-1950s.