The British Empire developed the largest real estate and economic network in the history of civilization. The factories of England shipped their products, including motorcycles, to every continent. Motorcycle brands such as Triumph, BSA, and Norton set the standard for excellence for generations of motorcyclists.
Some of the best photographs of any vehicles can be found in print advertisements. Oftentimes the ads will also include some factual history of a particular marque. The achievements of any vehicle manufacturer are deemed worthy and documented ultimately as a result of their products ongoing satisfactory use long after production has ceased.
Images scanned from magazines in my personal collection–M.T.