Another familiar historical phenomenon is the periodic conviction by the motorcycle industry that poor sales could be boosted if only their products were more like cars: cleaner, quieter, safer, more convenient, and with a higher social image (no rockers, racers, or oil-stained tinkerers need apply). This was a constant chant heard in Britain during the Great Depression and was acted upon by several makers in the immediate postwar years. Vincent built its fully enclosed Black Prince; no gears, cams or linkages were visible, just gleaming, squeaking fiberglass panels. The Sunbeam brand was affixed to a vibrating fat-tired design that appealed to very few. Velocette, its reputation based on production of sporting roadsters, decided to bet the farm on a liquid-cooled and underpowered thing called the LE, which appealed mainly to Her Majesty’s postal service.