• One of 1,368 right-hand drive fixed-head coupés made • Matching engine and chassis numbers • Professionally restored since acquisition • Extensive history file What would turn out to be the final glorious incarnation of Jaguar's fabulous 'XK' sports car family arrived in the spring of 1957.

As its nomenclature suggests, the XK150 was a progressive development of the XK120 and XK140, retaining the same basic chassis, 3.4-litre engine and four-speed Moss transmission while benefiting from a new, wider body that provided increased interior space and improved visibility courtesy of a single-piece wrap-around windscreen, replacing the XK140's divided screen.

The new model's main talking point, though, was its Dunlop disc brakes.

Fade following repeated stops from high speed had been a problem of the earlier, drum-braked cars, but now the XK had stopping power to match its straight-line speed.

The XK150 was available at first only in fixed and drophead coupé forms, the open roadster ve...