How much is a John Harrison watch worth?
The plot concerns the discovery and subsequent sale at auction of Harrison’s Lesser Watch H6. The fictional watch was auctioned off at Sotheby’s for £6.2 million.
Why is a chronometer important?
The purpose of a chronometer is to measure accurately the time of a known fixed location. This is particularly important for navigation.
How accurate was Harrison’s h4?
These clocks achieved an accuracy of one second in a month, far better than any clocks of the time. In order to solve the problem of Longitude, Harrison aimed to devise a portable clock which kept time to within three seconds a day. This would make it far more accurate than even the best watches of the time.
How much was the watch worth in Only Fools and Horses?
£6.2m
In this episode the Trotter brothers Del Boy and Rodney finally become millionaires after finding a rare pocket watch. They discover that the watch in their lock-up garage is in fact a John Harrison marine chronometer – the ‘Harrison Lesser Watch’ – which then goes on to sell at a Sotheby’s auction for £6.2m.
What is another name for chronometer?
In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for chronometer, like: timepiece, clock, hourglass, timer, watch, wristwatch, chronograph, sextant and metronome.
Who invented chronometers?
John HarrisonMarine chronometer / Inventor
How is H 4 different then the previous clocks Harrison made?
H4 incorporated the technical advances Harrison had used in his earlier timekeepers: temperature compensation, a remontoir and maintaining power but, crucially, it was smaller and had a balance running at 18,000 beats per hour.
How did the H4 watch work?
The H4 sea watch Christened H4 by Gould, the watch was essentially an extra-large pocket watch wound daily by key, with its 30-hour power reserve being stored in a steel spring inside a brass barrel. This in turn pulled a chain barrel and fusee containing Harrison’s “maintaining power” system.
Is the chronometer still used today?
More recent times. Quartz and atomic timepieces have made mechanical chronometers obsolete for time standards used scientifically and/or industrially. Most watchmakers do still produce them.