Up for sale is an ORIGINAL GENUINE BSA Workshop Manual. NOT A REPRINT!!! Very comprehensive. This particular book covers Unit Construction 500 & 650cc Twins. As with most of the other manuals I have or will be listing, it has been used by my father in his shop. There are signs of use but it is in very good shape. Although I haven't paged through it, there may be some notations hand written in. On this cover he wrote that it covers ET timing for the B44 and (G16 Norton I believe). He was known to do that from time to time. Please ask any questions you may have prior to bidding.