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Thomas Earnshaw watch men's leather strap test - test information on wristwatches

The Clock (from Middle High German ūr (e) ("Uhr"), from Middle Low German ūr (e), from old French (h) ore, from Latinhōra, from ancient Greek ὥρα ("Time, Hour"), from Urindo-European * yōr-ā, related to year) is a measuring device that displays the current point in time or measures a period of time. In its development history spanning several millennia, from the simple elementary clock to the high-precision atomic clock, it has been and is in complex interaction with the cultural, technical and social development of mankind.

The clock represents a fundamental parameter of human coexistence - time. In symbolism and art it stands for the perpetual flow of time; as a vanitas motif for transience and one's own mortality. But it also appears in representations as an indication of wealth or as an attribute of moderation.

Today the watch has become an indispensable companion in a wide variety of areas of everyday life. The wristwatch accompanies its wearer as a constantly available time display. The electronic clock can be found in many everyday objects, from household appliances to televisions and radio alarm clocks to computers and cell phones. In the technical world of work, time measurement determines both complicated production processes and simply the length of the working day for employees.

High-precision time systems (world time, atomic time) have been established for science and space travel, which are available everywhere through time signal transmitters and satellite radio. In astronomy, times are measured down to a millionth of a second, while the atomic clocks of GPS satellites today work better than nanoseconds and the time of flight measurement of electromagnetic waves even accuracies of 10−14 reached.

Although elementary and wheel clocks have lost their central role in timekeeping, they are still very popular with enthusiasts and collectors of antique pieces.