Important Collectors’ Wristwatches, P...

Geneva, Mandarin Oriental Hotel Du Rhône, May 13, 2007

LOT 390

"Master Clock System" Patek Philippe, Genève, Model L4011. Made circa 1975. Very fine and rare, Integrated Electronic T3 Master Clock System with independent minute and seconds comparators in a five-piece tower.

CHF 9,500 - 12,000

EUR 6,000 - 7,500 / USD 7,700 - 10,000

Sold: CHF 22,420

1. Antenna 2. Series 937, radio controlled clock MI based on radio signal from Prangins Observatory 3. Clock B, series 938 based on quartz regulator 4. minute comparator, constantly comparing if all clocks are running the same in terms of minutes and seconds 5. Model L 4021, 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. 64 x 42.5 cm.


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Grading System
Grade: AA

Very good
Case: 3

Good
Movement: 3

Good
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 in 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.