Seiko 7B24 Manual - Page 18
Technology, 500km
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■ Radio signal reception range: In the United States (WWVB) The reception range from the transmitting station is approximately 1,500 km (1,500 km radius of Fort Collins radio station). There are four time zones within the reception range. How to Set the Time and Date (Radio Signal Reception) 1,500km WWVB is operated by NIST. Fort Collins transmitting station Frequency: 60 KHz ※ NIST：National Institute of Standards and Technology Fort Collins transmitting station Frequency: 60 KHz ※ The watch may be able to receive radio signals outside a reception range if the receiving conditions are favorable. ※ The watch may fail to receive radio signals depending on the reception conditions (weather, geographic locations, radio disturbances such as tall buildings, and orientation of the watch). Environments in which it is difficult to receive a radio signal on page 100. 98
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