Concorde Machmeter that recorded fastest flight from London to New York goes up for auction
The machmeter that measured the ratio of the speed of the supersonic jet to the speed of sound was given to a respected British Airways engineer as a retirement gift.
From 0 to twice the speed of sound: The instrument is set at Mach 2.02 and shows the CG mark that enabled the pilot to to ensure the plane flew with minimum resistance to the atmosphere
The aircraft was also the last of the prestigious fleet of seven Concordes to fly out of Heathrow before they were taken out of service in 2003.
The dial has the numbers 202 on it which is twice the speed of sound.
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Concorde in flight: The legendary aircraft were retired in 2003Experts have given the item a pre-sale estimate of 7,000 but the price is expected to take off and soar to 20,000 due to the amount of interest from Concorde enthusiasts.
Another Concorde machmeter fetched 27,000 when it sold several years ago.
Simon Jones, of auctioneers Lawrences of Crewkerne, Somerset, said: 'This is a wonderful and rare piece of Concorde memorabilia.
! 'Mr Grav estock was a very well-respected engineer and this was a gift to acknowledge his long service with British Airways.
Rare memorabilia: The auction house said they expected the Machmeter to reach at least 20,000'Very few machmeters appear in auction so they are very difficult to value.
'We are expecting a huge amount of interest on the day. There are a huge number of Concorde collectors around the world and we have had lots of enquiries already.'Mr Gravestock spent his whole working life in the avionics industry. He started out working on Flying Boats in Southampton before moving to BA at Heathrow.
The auction takes place on May 6.
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