"RSAF/BSA Sparkbrook". Birmingham Gun Museum. Archived from the original on 15 March 2016. Retrieved 4 April 2016.. With photo showing the Lanchester Works down Montgomery Street.
See diagram of the 105 hp engine with a similar arrangement, in "Is the sleeve-valve engine suitable?". The Commercial Motor: 747 [13]. 12 January 1926. Retrieved 1 April 2016.
"RSAF/BSA Sparkbrook". Birmingham Gun Museum. Archived from the original on 15 March 2016. Retrieved 4 April 2016.. With photo showing the Lanchester Works down Montgomery Street.