This immaculate-looking Dominator features the period-correct twin leading shoe front brake and cigar-shaped silencers, but benefits from a Boyer electronic ignition conversion.

We understand that it spent its early years in Malta and was first UK registered when repatriated in 1994, since when it has had just three keepers, the most recent of whom has retained the bike for the last 10 years.

He presently regards the engine, four-speed gearbox, frame, suspension, paintwork, brightwork and cycle parts as all being in ‘excellent’ condition, and informs us that the last service was caried out eight years ago by the acclaimed Norton specialist Pete Lovell.

The 650SS (Sports Special) Dominator produced from 1962 to 1968 is considered by many to be the best of the Dommies.

It combined a slimline version of the company’s immortal ‘Featherbed’ frame with a 646cc development of its proven Bert Hopwood-designed parallel twin engine.

With an output of 49bhp, the SS had a top speed of 115mph-...