Dorman Engineering Co was situated in Northampton and then later in Stafford, and built D.E.C. Engines.
"The 1921-1924 Belsize-Bradshaw was fitted with a Dorman-built Bradshaw 1294cc oil-cooled V-twin"
W.H. Dorman & Co was a different company established in 1870 and based in Stafford which produced engines, among many other products.
British Engine Builder
Fitted to numerous British and European motorcycles.
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