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A self-taught watchmaker by the name of John Harrison discovered that a precise reading of a ships longitude could only happen if you knew the exact time. At this point, Harrison decided that he needed to create a watch that was far more accurate then what was available at that time. He worked for more then ten years to create 4 versions of the Harrison Marine Chronometer. He presented his plate sized watch to the royal academy and had his chronometers tested by people like Captain Cook. Harrison’s Marine Chronometer went through many trials and eventually was accepted by the Queen who then paid him his prize money of 20,000 pounds.
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Tungsten steel watches
ID: HP-020195
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ID: HP-020194
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ID: HP-013615
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ID: HP-013617
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ID: HP-013619
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ID: HP-013624
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ID: HP-013625
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ID: HP-013626
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ID: HP-013628
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ID: HP-013629
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ID: HP-013630
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ID: HP-013631
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ID: HP-013632
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ID: HP-013633
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ID: HP-013634
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ID: HP-013635
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ID: HP-013636
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ID: HP-013637
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ID: HP-013638
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ID: HP-013639

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