racer, it had a single racing seat and rear-set footrests. Rolland "Rollie" Free (18 November 1900 – 11 October 1984) was a motorcycle racer best known for breaking the US motorcycle land speed record in 1948 on the Bonneville Salt Flats, Utah on a Vincent Black Lightning. The picture of Free, prone and wearing a bathing suit, has been described as the most famous picture in motorcycling, and Russell Wright won another World Land Speed Record at Swannanoa with a Vincent HRD motorcycle in 1955 at . The 500 cc Meteor and Comet singles were introduced, along with a 500 cc racer, the Vincent Grey Flash. The Grey Flash racer used Albion gears, for the greater choice of ratios available. The 500 cc bikes used a wet multiplate clutch, while the 998 cc V-twins used a dry, drum-type servo clutch. Most Vincents had black tanks and frames. In 1949 a White Shadow (a machine to Black Shadow mechanical specification, but with silver engine casings) was available, but only 15 were sold, and the option was dropped in 1952. In 1950 16 Red Comets were shipped to the United States. There were also 31 of the 1948 Grey Flash built. During the Korean War nickel chrome steel was officially regulated, meaning the correct materials for some components (e.g. gears) were not available. Some motorcycles built during this period had black rims. From 1950, HRD was dropped from the name, and the logo now simply read The Vincent. 1954 Series D Vincents The Series D was a natural progression of upgraded machine specification with a modifications to the rear subframe, suspension, seat arrangement and with a new hand-operated stand. Additional new models were created introduced by fitting some machines with a fibreglass handlebar fairing having a tall screen and matching front legshields and long side enclosures, creating streamlining to improve rider comfort. Named Victor (based on the Comet), Black Knight (based on the Rapide) and Black Prince (based on the Shadow), they were poorly received by the public and suffered delays in production when waiting for the new bodywork to be supplied with an acceptable paint finish. Sales declined further after the post-war motorcycling boom owing to the availability of cheaper motor cars, a little over 500 "Series D" models were made in total. All motorcycle production ceased in December 1955. Fireflys, three wheelers, and NSU The Firefly was a 45 cc