Triumph Roadster: dickey seats, Bergerac and the last of a breed (1946–1949) The Triumph Roadster of 1946 carried the last production dickey seat in the world, borrowed its engines from Jaguar and the Vanguard, and found lasting fame as Bergerac's car. A guide to the 1800 and 2000 Roadsters, the television legend, buying checks and values.