Download or read book Triumph Speed Twin & Thunderbird Bible written by Harry Woolridge and published by David and Charles. This book was released on 2016-07-04 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive history of Triumphs two most popular models in the 1940s and 1950s In depth information on the Thunderbird not previously available. Year-on-year development history on both models. Year-by-year engine and frame numbering enabling correct identification. Colour schemes used throughout the model life. Photographs and colour prints showing each model in detail. Competition success and achievements for both models.