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 MSS was first registered to G E Tunbridge of Tunbridge Wells, Kent on 1st May 1954, and was acquired by the current vendor in August 2009. We are advised that the magneto was rebuilt by W H Day around three years ago and that the front wheel bearings have been renewed. The toothed-belt dynamo drive and an electronic voltage regulator are sensible upgrades. Last ridden in September 2016 and described as in generally good condition, the machine is offered with sundry invoices; a quantity of expired MoTs and tax discs; SORN paperwork; a V5C document; and an original owner's handbook, service manual, and parts list.