Solos and Combinations from Birmingham Small Arms
For 1939, BSA offered the following models:
B21 De Luxe 250cc
B21 250cc Standard
C10 250cc De Luxe
C10 250cc Standard
C11 250cc
B23 350cc Standard
B25 350cc Competition
B26 350cc
B23 500cc De Luxe
B24 500cc Silver Star
M20 500cc De Luxe
M20 500cc Standard
M22 500cc Standard
M23 500cc Silver Star
M24 500cc Gold Star
M21 600cc
G14 Twin 1000cc