HAYNES BSA A7 & A10 Twins 497cc 646cc - 1947 on OWNERS WORKSHOP MANUAL Jeff Clew England: Haynes, 1973 print. 127 numbered Pages. Pictorial Card Cover. No Dustjacket Issued. ISBN: 0856961213. This manual covers the following models: BSA A7 Twins (495cc, 497cc - 1946-1950, 1950-1962), BSA A10 Twin 1950-1962 646cc. See photographs The Condition is Fair/Good. Discolouring, some scuffs, edge/corner wear and handling wear to covers. Some small marks, light handling wear to internal pages but mostly in a good condition inside,.