Humfrey-Sandberg Co
of 40, Grosvenor-gardens, London
1927 Admiral Sir Sydney Fremantle is Director and Chairman.[1]
1928 'Humfrey-Sandberg Co have pleasure in announcing that, after exhaustive test, the following manufacturers have definitely decided to include the Humfrey-Sandberg Free Wheel Clutch in all 1929 models when required.'[2]
1928 Captain Irving, Chief Engineer of the Humfrey Sandberg Co.[3]