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Radio-Controlled Watches

For those who demand the highest precision at all times, there are now watches that synchronize automatically to radio signals based on atomic time standards.
Junghans

In 1991 Junghans Uhren GmbH of Germany marketed the Mega 1, the first radio-controlled wristwatch ever sold. It receives signals in Central Europe within the range of the transmitter near Frankfurt/Main.
Citizen

Citizen Watch Co. of Japan followed in 1993 with an analog radio-controlled watch capable of receiving radio waves from multiple stations. By changing the receiving mode, the watch's antenna can receive signals for Japanese standard time, Central European time or British standard time.

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