Introduced in 1925, Velocette's "cammy" K-series roadsters were quite advanced for their time, featuring a bevel-shaft-driven overhead cam and soon a foot-operated, positive-stop gearbox when many competitors still had balky hand shifters and foot clutches. Tuned KTT versions quickly became racebikes to be reckoned with at Brooklands and the Isle of Man, while sport riders hit the British backroads on KSS models. Introduced in 1936, a Mk.II version of the 350cc single gained an aluminum cylinder head and enclosed valvegear, plus an improved chassis.

Henry Manney wrote enthusiastically of the KSS Velocette in a Cycle World salon and apparently acquired this machine for restoration soon after. It is partially assembled but the majority of components to finish the bike are included in this sale. Offered on a Bill of Sale.