c.1931 BSA L31 6 De Luxe, 349cc twin port Project. Registration number not registered. Frame number Y5.2387. Engine number Y6.1297. The 1930s BSA marque was renowned for making strong reliable bikes and in these austere times bikes like the L31 were economical and were just as efficient getting the rider to work every day as they were going on the holiday run. This example comes with no paperwork and is incomplete, it will make an interesting project.