Franklin and Isaacson
of Great Wilson Street, leeds
1904 Advertisement. Engineers and Millwrights, of Great Wilson Street.[1]
1906 'There are some interesting details in "The Motor Cycle" of a new four-cylinder, air-cooled engine, for use upon motor-cycles and tricars. The engine is designed and constructed by Messrs. Franklin and Isaacson, of Leeds. The cylinder dimensions are 2.5 by 3 inches, and the speed can be varied from 400 to 3,000 revolutions per minute. The weight of the engine itself is 110lb. It is 2ft. long, 1ft. 3in. high, and 10in. broad. A governor of special design is fitted, and can be set to cut out at any speed.'[2]
1907 Advertisement for staff. Franklin and Isaacson (Limited), Engineers, Great Wilson Street. Leeds.[3]