PDM-Illston were motorcycles produced in 1914. All the engines were made by G. H. Illston of Gooch Street, Birmingham.
The range comprised three models. Two were fitted with 2¾hp or 3hp single-cyclinder engines with overhead inlet valves, and the third had a 5hp V-twin.
It is likely that the firm then diverted to war work.
Made motorcycle engines
1913 No. of Company: 127176; G. H. Illston and Son Ltd.