Nick Smith writes:
Interesting to see that the 'road' models used the shorter 5-1/2" headstock lug, instead of the braced one on the TT bike. They seemed to retain the straight top tube frame, despite the general rush to dropped-top tubes for 1912. Otherwise, DC 366 shows a few more nice details - Brown & Barlow carb (which tended to be standard issue on a Precision engine-set), silencer, engine plates, foot-brake etc look like standard items seen on other Precision-engined bikes.

Image sourced by Steve Allport

Cleveland Motorcycles