Wikipedia
First entered at Brooklands on the Easter Monday meeting of 1925, this tiny two seater cyclecar had a 344cc JAP motorcycle engine. The car was designed by H.M.Walters and built by the coachbuilders Jarvis of Wimbledon. The frame was made from the wood ash with 3/32 inch steel flitch plates and tubular cross-members. It had expanding rear brakes on the rear, but no front brakes. The wheels where shod with 650x65 motorcycle tyres, which were attached by a chain-driven axle to a two-port overhead valve 74x80mm single-cylinder JAP engine via a three-speed gearbox (chain-driven from the engine).
Walters managed to break the Class J flying mile record in the car at a speed of 70.33mph, but by 1926, the original engine was replaced with a 495cc JAP engine. The car was then obtained by Mrs Gwenda Stewart, who changed the cars name to Hawkes-Stewart and refitted the original 344cc engine. Unfortunately the car was destroyed in a garage fire at Autodrome de Linas-Montlhéry in 1932.
Jarvis of Wimbledon intended to build replicas, but none are believed to have been produced.