G. H. Dingwall and Son (Engineers)
of Derby Road, Dalston
1912-1949 Produced 3-wheelers later used as invalid carriages - mostly used 197cc Villiers engine
Dingwall produced hand-propelled and motorised tricycles for the Ministry of Health (others were Argson Engineering Co and R. A. Harding and later Invacar, Tippen, A.C. and George Fitt Motors.