The third of Velocette's overhead-valve, high-camshaft, single-cylinder designs, the 500cc MSS was announced in 1935. The first of these new models had been the 250cc MOV of 1933, which was joined for 1934 by a long-stroke 350cc version - the MAC. In creating the MSS, Veloce kept to the basic design, combining the MAC's 96mm stroke with a larger bore to create its new '500'. The MSS engine went into a new frame derived from that of the racing KTT. The model disappeared from Veloce Limited's range in 1948 while the company concentrated on the LE, reappearing in 1954 with a new swinging-arm frame and Hall Green's own telescopic front fork. The engine too was updated, gaining 'square' bore and stroke dimensions of 86x86mm along with an alloy cylinder barrel and 'head.

This pre-war MSS was purchased by the vendor's father in November 1959 and has been in the family ever since. Last taxed in 1965, the machine has been kept in dry storage since then and its engine turned over occasionally. We are advised that the engine turns and that the gears select. Offered for restoration and sold strictly as viewed, the machine comes with an old-style continuation logbook (1961) and an old-style V5 registration document.