Introduced in 1952, the Armstrong Siddeley Sapphire 346 marked the company’s confident return to the executive-class saloon market.

Powered by a smooth 3.4-litre six-cylinder engine coupled to a four-speed synchromesh gearbox, it provided quiet and flexible performance with the restrained elegance typical of the marque.

Buyers in period valued its craftsmanship, quality materials and dignified road manners, making it a credible rival to offerings from Jaguar, Daimler and Rover.

This 1954 example, registration PFJ 698, is finished in black over light grey with a red leather interior that displays gentle age and patina consistent with long-term care.

The walnut veneers and brightwork present well, while the engine bay appears tidy and in generally well-kept order.

Recent maintenance has included a water-pump overhaul and an earlier brake service, and the car is understood to run and drive.

A “Best in Class” winner at the 2015 Armstrong Siddeley Owners Club National Rally, PFJ 698 i...