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  1. 3. The name of the British watchmaker who invented the marine chronometer, and completed his first chronometer in 1735.
  2. 5. The name of the British watchmaker who invented the balance spring in 1657.
  3. 7. The name of the British watchmaker who invented the lever escapement in 1755.
  4. 9. The name of the British watchmaker who invented the deadbeat seconds escapement in 1735.
  5. 10. The name of the British watchmaker who first developed centre seconds in 1765.
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  1. 1. The name of the British watchmaker who first developed the first repeating mechanism in 1687 and minutes hand in 1690.
  2. 2. This British watchmaker was the sole apprentice of the watchmaker who created the co-axial escapement, and would later refine it further.
  3. 4. The name of the British watchmaker who invented the co-axial escapement in 1976 and patented it in 1980.
  4. 6. The name of the British watchmaker who invented the spring detent escapement in 1782.
  5. 8. The name of the British watchmaker who invented automatic winding in 1924.