August 8, 2018, 4:37 pm by Justin King The milestone reinforces the Mustang\’s claim as America\’s best-selling sports car of the last 50 years. Ford has kicked off a celebration for the Mustang after the 10 millionth unit rolled off the Flat Rock assembly line this week. The milestone Mustang is a 2019 GT convertible in Wimbledon White with a 460-horsepower V8 and six-speed manual gearbox. The first serialized Mustang (VIN 001) produced in 1964 was the same color and model with a three-speed manual transmission and 164-horsepower V8. Ford claims the Mustang is America’s best-selling sports car over the past 50 years, based on an analysis of 1966-2018 new vehicle registrations tallied by IHS Markit. The iconic pony car is also said to lead global sports-car sales for three years straight. “I get the same thrill seeing a Mustang roll down a street in Detroit, London or Beijing that I felt when I bought my first car – a 1966 Mustang coupe that I drove across the country as a teenager,” says Ford global markets president Jim Farley. “Mustang is a smile-maker in any language.” Ford is celebrating the milestone with employee celebrations at its Dearborn headquarters and its Flat Rock assembly plant, including flyovers from three World War II-era P-51 Mustang fighters.