A pair of motorcycle army couriers seek relief from the front during the horrendous hostilities of World War 1. Photo courtesy of The Imperial War Museum.

The Triumph model H single cylinder 550cc motorcycle was a true precursor to the Twentieth Century’s history of British ‘cycles. It was the first Triumph to have a single cam wheel with 2 cams instead of separate cam wheels for the inlet and exhaust valve. The entirely new cylinder casting had a larger valve head diameter and the valves were spaced further apart. Another  great improvement over the 1914 style 3-speed hub is the Sturmey Archer countershaft gearbox: allowing for heavier and stronger gearing. Furthermore the primary chain drive was enclosed by an aluminium protective cover.
The Model H became a dependable and successful moto with some 30,000 supplied to the British and allied forces during the Great War.

Here’s a beautiful portrait of the engine by the esteemed motorcycle photographer Daniel Pierce.

In 1916 the war was well and truly in its bloodiest hour with the Battle of the Somme at its core. 57,000 casualties on the FIRST DAY. One can’t imagine… But one can’t forget either.