In 1933 Veloce Limited augmented its overhead-camshaft range with an overhead-valve 250 - the MOV - that would spawn an entirely new range of OHV singles. The newcomer's engine was a 'high camshaft' design with enclosed valves, and the compact and sprightly machine featured a four-speed gearbox equipped with the company's new foot-change mechanism. The following year an overhead-valve '350' built along MOV lines appeared. This was the long-stroke MAC, subsequently bored out to create the 500cc MSS. Consisting of a 1934 MOV engine in a 1941 MAF ('military' MAC) frame, this Velocette 'special' has been used for sprints and hill climbs, but has not been run since the magneto was rebuilt and the Amal Concentric carburettor fitted. Other noteworthy features include lightened valve gear, raised compression ratio and a larger inlet valve. The original carburettor is included in the sale.