LONDON.- Bonhams announced the consignment of an important collection of Maseratis for its Goodwood Revival Sale.

The four cars, some of which have not been seen at market for six decades, come from the collection of the Hartley family, from the Home Counties. They are expected to realise several million pounds in total at the auction at the nearby Goodwood Motor Circuit on Saturday 15 September.

Leading the pack is a unique 1929 Maserati Tipo 26M four-seater sports racing car with Brooklands Double Twelve, Irish Grand Prix and RAC Tourist Trophy racing pedigree. Estimated to realise between £1.8 and £2.2 million, the car has been owned by the family for 60 years and has been restored and campaigned over a 30-year period.

The two-seater sister car also in the collection is expected to sell for between £400,000 and £600,000. Respected Maserati club member Anthony Hartley found the car in South Africa in the 1970s and, in the following years, carried out a painstaking re-build and restoration, tracking down many of the original components.

Also in the collection is a V4 16-cylinder Grand Prix car replica (estimate £400,000 - £500,000) that has been much-admired on the Maserati Club circuit. Built from scratch by Mr Hartley, it is a perfect copy of one of the most awe-inspiring Grand Prix racing cars of all time – “the Sedici Cilindri” – that was capable of speeds of up to 170mph in the 1920s.

A 1955 Maserati A6G2000 Coupe, coachwork by Allemano, also in the collection is expected to realise between £200,000 and £250,000 at the sale.

Malcolm Barber, Bonhams Group CEO, said: “Anthony Hartley is a real Maserati connoisseur whose love of the marque began in the early 1950s when the four-seater Tipo 26M sports racer first came into his family’s ownership.

“He is a knowledgeable engineer and craftsman who has researched the Maserati marque, followed the work of the four Maserati brothers and in some cases continued their evolution.”

Two cars from the Hartley Collection – the V4 and the A6G2000 – will be on display at the Bonhams stand at this weekend’s Vintage Sports Car Club Prescott Speed Hill Climb in Prescott, Gloucestershire, prior to their sale in September.