Fortuna Machine Co
of Deacon Street, Leicester
1908 Incorporated as a limited company.
1914 Engineers and manufacturers. Specialities: patent leather skiving machines; patent power hack saws; patent measuring and testing instruments; patent internal grinding attachments. 
It appears that their products, including mechanical hacksaws, were largely sourced from Fortuna-Werke of Germany. It appears that their machines were assembled from components imported from Germany, in order to claim local manufacture. Fortuna-Werke founded by Albert Hirth in 1903