Important Watches

Geneva, Mar 20, 2010

LOT 119

Patek Philippe World Time Tower Patek, Philippe, Genève. Made circa 1975. Very fine Integrated T3 Electronic Master Clock System, five-module tower with clock A based on radio signal from Observatory and showing the time in ten cities of the world.

CHF 13,000 - 16,000

USD 12,000 - 15,000 / EUR 9,000 - 11,000

1. Module L 4011, series 0498, radio controlled clock based on radio signal from Prangins Observatory 2. Clock B, module L 4011, series 0516, based on quartz regulator 3. Module L 4021, series 067, minute comparator, constantly comparing if all clocks are running the same in terms of minutes and seconds 4. Module L 4032, series 058, showing time in five different places of the world 5. Module L 4032, series 074, showing time in five different places of the world. Very powerful Master Clock System capable of controlling an almost unlimited number of slave clocks. Capable of being regulated to 1/1000 of a second. Dim. 67 x 48 x 19 cm.


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Grading System
Grade: AA

Very good
Case: 3

Good
Movement: 3*

Good

Overhaul recommended, at buyer's expense
Dial: 3-01

Good

HANDS Original

Notes

The three clock units measure the time separately. Each one is equipped with a quartz-crystal oscillator and electronic dividers. The results are compared in the control unit which is built into the time unit. If one of the clock units shows a difference, it is automatically switched off. To increase precision the clock system is synchronized each second by the time signal from the Prangins observatory, near Geneva. The radio station with the call letters HBG, located in Prangins, near Geneva Switzerland, is the official Swiss broadcaster of encoded time signals. The location of the antenna is: 46 degrees 24' North, and 6 degrees 15 ' East. It broadcasts at the exact frequency of 75 kHZ, and under good conditions its signal can be received at a distance of up to 1500 kilometers, covering most of continental Europe.
The signal is processed by automatic radio clocks to display the exact time.