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Floor Guide
Floor Guide Top
B1Extreme times
1FThe beginnings of time
2FAlways one step ahead of the rest
3FFrom time indicated by natureto human-made time
4FPrecise (Seiko) time
5FA variety of times
Seiko and Timepieces History
Portable Clocks
The invention of the balance wheel and the cylinder escapement
Age of Discovery and Marine Chronometers
Temperature and regulators
Christiaan Huygens (1629-1695)
Abraham-Louis Breguet（1747-1823）
