Junghans radio-controlled watches adjust automatically via radio signal to transmitted time of one of world's most accurate clocks, the cesium-based time of the Physical Technical Federal institute in Braunschweig. With a devia-tion of 1 second within one million years! .

The secret of their accuracy?
A receiver system, mini board with microprocessor and a regulating and controlling device The cesium time-base transmits a so-called time-telegram to the time-signal transmitter DCF-77 in Mainflingen nearby Frankfurt. The transmitter broadcasts the coded time-telegram over the long wave of 77.5 kHz. The receiver system of the radio-controlled watch receives the time signal, which is then decrypted by the microprocessor and passed on to a step-ping motor to adjust the watch with absolute accuracy.

Continuous reception within more than 1,500km range around the transmitter DCF-77 is guaranteed. Outside of the range of reception, the watch works like a standard quartz-watch in the event of reception interference a functionality check can be performed by activating a transmitter call button, upon which the watch automaticalIy self-adjusts again.

• Watch Designer
• Radio controlled movement