The town sedan series is the stylemaster trim level (base). The sport sedan is the fleetmaster trim level (deluxe). They were both availible in 2door and 4 door bodies. There was also a Fleetline 4 door sedan body style ther was different from the other 2 levels. Both the front and rear doors are different lengths and the rear vent assembly is mounted in the rear doors rather than the C pillar of the body. This style is commonly called a German Helmet.