The BMW 503 is a two-door 2+2 gran turismo in both Coupé and Cabriolet form manufactured by German automaker BMW from 1956 until 1959. The company developed the 503 alongside the 507 roadster in an attempt to sell a significant number of luxury cars in the United States. The 503 and 507 cost about twice their projected price and did not recover their costs. During production from May 1956 to March 1959, 413 units of the 503 were built, 139 of which were Cabriolets. Even though it was a prestige model it resulted in heavy losses for BMW. (Source: Wikipedia.org, CC BY-SA)