Machine-History.Com

In 1953 the French made Rovin D4 Convertible had a top speed of 50 m.p.h. and a $1,033 price tag.
Its power-plant was a 4 stroke, water cooled, 462cc, two cylinder, 13 hp engine.
Weight: 915 pounds
Length 9.75 feet
Width 3.91 foot
Gas Tank Capacity 5.9 gallons
Years of Production: 1950-1961
shown in the Paris' Grand Palais.
source: Time, wikipedia