Collector's Pocket Watches, Wristwatc...

Noga Hilton, Geneva, Apr 12, 2003

LOT 320

Patek Philippe, Genève, circa 1975.Very fine and rare Integrated Electronic chiming Master Clock System with independent minute and seconds comparators, seven-piece tower:

CHF 13,000 - 18,000

EUR 9,000 - 18,000 / USD 9,600 - 13,500

1. Antenna2. Series MI 80, radio controlled clock MI based on radio signal from Prangins Observatory.3. Clock B based on quartz regulator4. Clock C and minute comparator, constantly comparing if all clocks are running the same in terms of minutes and seconds.5. Programmable unit with tape for setting the clock for performing different functions at specified times with chiming feature.6. Model L 4031, showing time in four different places of the world (New York, Buenos Aires, Tokyo, Hong Kong).7. Amplifier and sound controlVery powerful Master Clock System capable of controlling an almost unlimited number of slave clocks, and performing different functions, such as more often than every minute. Capable of being regulated to 1/1000 of a second. Comes with a copy of factory manual.Signed on every piece.Dim. 118 cm x 42 cm.


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Grading System
Grade: AAA

Excellent
Case: 3
Movement: 3*
Dial: 3 - 01

Notes

The three clock units separately count the time. Each one is equipped with a quartz-crystal oscillator and electronic dividers. The results are compared with each other in the control unit which is build in the time unit C. If one of the there clock units show a difference it is automatically switched off.To increase the precision the clock system it is synchronized each second by the time signal from the observatory Prangins Genève.The punched tape cassette programmer is able to actuate a pre-set time signal for every minute of a day for seven days. It comes with chiming confirmation. This is one of the most sophisticated electronic clock systems produced by Patek Philippe.Similar clock was exhibited this summer in the Parliament House in Bern on the occasion of its 100 Anniversary.!