Norton Twin Restoration - All Post-War Twins: Commando, Featherbed, Dominator and Jubilee Series by Roy Bacon. The essential guide to the renovation, restoration and development history of all post-war Norton Twins including Commando, Featherbed, Dominator and Jubilee series. Plus how to recognize parts, improve specifications and maintain these classic motorcycles. Published by Osprey Publishing in London in 1987.