Triumph Speed Twin & Thunderbird Bible

Here is the definitive history of Triumph''s hugely popular Speed Twin and Thunderbird models.
Much more than simply a history, this book is the ultimate single source of detailed information for owners and would-be owners of these classic Triumph twins: in fact, it is the Speed Twin and Thunderbird Bible.
Between these covers will be found the year-on-year development history from 1938 to 1966, en...