Originally published under the title The Book of the BSA Twins by W. C. Haycraft this book is one of The Motorcyclist's Library series published in the USA by F

124 pages, 78 black & white illustrations, size 5.5 x 8.5 inches. Originally published under the title The Second Book of the BSA Twins by A.G. Lupton, this boo

196 pages, and more than 250 illustrations and charts, size 8.25 x 10.75 inches. In 1945, after the war had ended, BSA resumed production of their civilian line