A 'time-warp' classic Rolls-Royce that's had one owner for 50 years and covered a mere 604 miles from new has sold at auction for more than double its market value.The 1977 Silver Shadow I is one of the last examples off the production line of the model that ushered the legendary British luxury marque into the modern era.It became the car of choice for the generation's A-listers, with famous owners including Paul McCartney, David Bowie and Freddie Mercury.But few have been cherished and preserved to such an incredible standard as the one sold last week by H&H Classics at Kelham Hall in Nottinghamshire.The hammer dropped at £82,125 - more than £12,000 above its lower estimate. It was also two-and-a-half times the market price for a museum-quality example, which, according to classic car insurer Hagerty, is £33,500.Its sale made it the most expensive non-celebrity-owned Silver Shadow I ever to appear at public auction. Just 604 miles in half a century: This 1977 Rolls-Royce Silver Shadow - which has been stored in a climate-controlled garage for 33 years - has sold for more than twice its market valueThe vehicle was purchased new from P. J. Evans of Birmingham in January 1977, having been ordered with a beige hide interior and whitewall tyres.Being a later version of the Mk I, it has the larger 6.75-litre all-aluminium V8 engine.The vendor paid £16,897.75 before tax; adjusted for historic inflation, that's £102,138 in today's money.For the last 33 years of its life, the stunning Rolls-Royce has been stored in a climate-controlled garage.To provide a further layer of protection, the vendor had it raised off the ground on axle stands to conserve the suspension components and tyres, while the bodywork has been cocooned by a tailor-made cover. The hammer dropped at £82,125 - more than £12,000 above its pre-sale estimate. It was also two-and-a-half times the £33,500 market value for a museum-quality example Its sale made it the most expensive non-celebrity-owned Rolls-Royce Silver Shadow I ever to appear at public auctionIts extensive history file also shows that 'SDU 999R' covered the bulk of its 604 miles in the first few months of its life before being wheeled away for safekeeping.By November 1977, it had covered 412 miles. Subsequent use amounted to just a few dozen miles per year, or less, including for the vendor's daughter's wedding in 1986, until the car was placed into storage after 590 miles in 1993.A couple of other 'fleeting journeys' have ticked the odometer up to 604.Described as 'extremely original', its entire factory paintwork, interior and mechanicals are as they were when it left the Crewe assembly line some 49 years ago.What makes its sale price all the more surprising is that Silver Shadows were built in relatively large numbers for a Rolls-Royce, and the model has a high survival rate compared with cars of its era.As such, there are plenty of good examples still on the road today, meaning no exclusivity to push values higher.This is why Hagerty says you can find a 'good' restored example today for as little as £8,700.But H&H Classics says it 'very much doubts' another one will come to the market that's as good as this - especially one that's complete with all the factory-supplied literature, plus its original sales invoice.Responding to the size of the winning bid, James McWilliam, sales manager at H&H Classics, said: 'It's no surprise that this time-warp Rolls-Royce did so well when you consider its single ownership, originality and incredibly low mileage.'Its sale was one of many highlights at the auction, which saw 55 classic, collector and performance motorcars successfully hammered away for a combined total of over £1.7million. The vendor bought it new in January 1977 for £16,897.75 before tax; adjusted for historic inflation , that's £102,138 in today's money The majority of the car's 604 miles were clocked up in the first 12 months of its life. It has been preserved ever sinceAmong these was a 2010 Bentley Brooklands Coupé, once owned by Jay Kay of Jamiroquai between 2019 and 2021.The winning bid was £147,375 - more than £27,000 above its lower estimate.Other highlights from the auction saw a 1983 Ferrari 308 GTS Quattrovalvole, showing just 20,000 miles, find a new home for £92,250, again more than £27,000 above its lower estimate.As well as being one of the most iconic supercars of the 1980s, the model sold by H&H Classics is one of only 233 UK-supplied, right-hand-drive examples.There were also strong performances from a wide selection of desirable British cars, not least another Rolls-Royce - this time a 1993 Rolls-Royce Corniche Convertible IV, which had been in current family ownership for 30 years and sold for £100,000, £10,000 above its lower estimate.Some 65 years on from the official launch of the Jaguar E-Type, two examples flew the homegrown classics flag and demonstrated the enduring appeal of the car.The first was a stunning 1967 Jaguar E-Type 4.2 Coupé, which was snapped up for £59,344, more than £9,000 above its lower estimate.The second, a 1969 Jaguar E-Type 4.2 Fixed Head Coupé, which was extensively restored in 2003, sold for £34,875 - almost £6,900 above its pre-sale guide price. CARS & MOTORING: ON TEST